/* ============================================================
   JANUM Digital Solutions — Main Stylesheet
   Version: 1.0.0
   Author: JANUM Dev Team
   Description: Full custom CSS design system. No frameworks.
   ============================================================ */

/* ============================================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================================ */
:root {
  /* Color Palette */
  --color-primary:        #0066ff;
  --color-primary-dark:   #0052cc;
  --color-primary-light:  #3385ff;
  --color-primary-alpha:  rgba(0, 102, 255, 0.08);
  --color-secondary:      #0f1419;
  --color-secondary-soft: #1a2332;
  --color-bg:             #f5f7fa;
  --color-surface:        #ffffff;
  --color-accent:         #6366f1;
  --color-accent-light:   rgba(99, 102, 241, 0.1);
  --color-success:        #27ae60;
  --color-error:          #e74c3c;
  --color-warning:        #f39c12;

  /* Text Colors */
  --text-primary:   #0f1419;
  --text-secondary: #4a5568;
  --text-muted:     #718096;
  --text-light:     #a0aec0;
  --text-inverse:   #ffffff;

  /* Border Colors */
  --border-light:  #e2e8f0;
  --border-medium: #cbd5e0;
  --border-dark:   #a0aec0;

  /* Typography */
  --font-primary: -apple-system, 'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:    'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

  --fs-xs:   0.75rem;    /* 12px */
  --fs-sm:   0.875rem;   /* 14px */
  --fs-base: 1rem;       /* 16px */
  --fs-lg:   1.125rem;   /* 18px */
  --fs-xl:   1.25rem;    /* 20px */
  --fs-2xl:  1.5rem;     /* 24px */
  --fs-3xl:  1.875rem;   /* 30px */
  --fs-4xl:  2.25rem;    /* 36px */
  --fs-5xl:  3rem;       /* 48px */
  --fs-6xl:  3.75rem;    /* 60px */
  --fs-7xl:  4.5rem;     /* 72px */

  --fw-normal:    400;
  --fw-medium:    500;
  --fw-semibold:  600;
  --fw-bold:      700;
  --fw-extrabold: 800;
  --fw-black:     900;

  --lh-tight:  1.2;
  --lh-snug:   1.375;
  --lh-normal: 1.5;
  --lh-relaxed:1.625;
  --lh-loose:  2;

  --ls-tight:  -0.05em;
  --ls-snug:   -0.025em;
  --ls-normal:  0em;
  --ls-wide:    0.025em;
  --ls-wider:   0.05em;
  --ls-widest:  0.1em;

  /* Spacing Scale */
  --space-1:  0.25rem;   /* 4px */
  --space-2:  0.5rem;    /* 8px */
  --space-3:  0.75rem;   /* 12px */
  --space-4:  1rem;      /* 16px */
  --space-5:  1.25rem;   /* 20px */
  --space-6:  1.5rem;    /* 24px */
  --space-8:  2rem;      /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */
  --space-20: 5rem;      /* 80px */
  --space-24: 6rem;      /* 96px */
  --space-32: 8rem;      /* 128px */

  /* Border Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-2xl:  24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md:  0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg:  0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl:  0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
  --shadow-primary: 0 8px 25px rgba(0, 102, 255, 0.3);
  --shadow-primary-lg: 0 15px 40px rgba(0, 102, 255, 0.4);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.1), 0 20px 40px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition-fast:   0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --container-max:    1280px;
  --container-narrow: 900px;
  --header-height:    72px;
  --sidebar-width:    300px;

  /* Z-Index Scale */
  --z-base:     1;
  --z-dropdown: 100;
  --z-sticky:   200;
  --z-overlay:  300;
  --z-sidebar:  400;
  --z-modal:    500;
  --z-toast:    600;
}

/* ============================================================
   2. CSS RESET & NORMALIZATION
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-normal);
  line-height: var(--lh-relaxed);
  color: var(--text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Prevent FOUC */
body.js-loading * {
  transition: none !important;
}

img, video, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-snug);
  color: var(--text-primary);
}

p {
  line-height: var(--lh-relaxed);
}

/* ============================================================
   3. UTILITY CLASSES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between{ display: flex; align-items: center; justify-content: space-between; }
.flex-col    { display: flex; flex-direction: column; }
.grid        { display: grid; }

.hidden      { display: none !important; }
.visible     { visibility: visible; }
.invisible   { visibility: hidden; }

/* ============================================================
   4. SECTION LAYOUT SYSTEM
   ============================================================ */
.section {
  padding-block: var(--space-24);
  position: relative;
}

.section--light {
  background-color: var(--color-surface);
}

.section--dark {
  background-color: var(--color-secondary);
  color: var(--text-inverse);
}

.section--gray {
  background-color: var(--color-bg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-primary);
  background-color: var(--color-primary-alpha);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(var(--fs-3xl), 4vw, var(--fs-5xl));
  font-weight: var(--fw-extrabold);
  letter-spacing: var(--ls-snug);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: var(--lh-tight);
}

.section-title--light {
  color: var(--text-inverse);
}

.section-subtitle {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin-inline: auto;
  line-height: var(--lh-relaxed);
}

.section-subtitle--light {
  color: rgba(255, 255, 255, 0.75);
}

/* ============================================================
   5. HEADER & NAVIGATION
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: transparent;
  border-bottom: 1px solid transparent;
  z-index: var(--z-sticky);
  transition: all var(--transition-slow);
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
  height: calc(var(--header-height) - 10px);
}

/* Header Text Visibility Logic */
.header:not(.scrolled) .header__logo-text,
.header:not(.scrolled) .nav__link {
  color: white;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header:not(.scrolled) .header__logo-text span {
  color: white;
  opacity: 0.9;
}

.header.scrolled .header__logo-text {
  color: var(--color-secondary);
}

.header.scrolled .nav__link {
  color: var(--text-secondary);
}

.header.scrolled .nav__link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-alpha);
}

.header:not(.scrolled) .nav__link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
}

/* Header CTA Visibility */
.header:not(.scrolled) .header__cta {
  background-color: white;
  color: var(--color-primary);
}

.header:not(.scrolled) .header__cta:hover {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 8px 20px rgba(0, 102, 255, 0.3);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.header__logo-img {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.header__logo-text {
  font-size: var(--fs-xl);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  color: var(--color-secondary);
  line-height: 1;
}

.header__logo-text span {
  color: var(--color-primary);
}

/* Desktop Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: calc(100% - var(--space-6));
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base);
  transform-origin: center;
}

.nav__link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-alpha);
}

.nav__link:hover::after,
.nav__link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav__link.active {
  color: var(--color-primary);
  font-weight: var(--fw-semibold);
}

/* CTA Button in Nav */
.nav__cta {
  margin-left: var(--space-4);
  padding: var(--space-2) var(--space-5);
  background-color: var(--color-primary);
  color: var(--text-inverse) !important;
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  transition: background-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
}

.nav__cta::after {
  display: none;
}

.nav__cta:hover {
  background-color: var(--color-primary-dark) !important;
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

/* Hamburger Button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  gap: 5px;
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
}

.hamburger:hover {
  background-color: var(--color-bg);
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base),
              opacity var(--transition-base),
              width var(--transition-base),
              background-color var(--transition-base);
  transform-origin: center;
}

.header:not(.scrolled) .hamburger__line {
  background-color: white;
}

.header.scrolled .hamburger__line {
  background-color: var(--text-primary);
}

.hamburger.active .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   6. MOBILE SIDEBAR
   ============================================================ */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base),
              visibility var(--transition-base);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

.sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--sidebar-width);
  height: 100dvh;
  background-color: var(--color-surface);
  z-index: var(--z-sidebar);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
}

.sidebar.active {
  transform: translateX(0);
}

.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.sidebar__logo-text {
  font-size: var(--fs-lg);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  color: var(--color-secondary);
}

.sidebar__logo-text span {
  color: var(--color-primary);
}

.sidebar__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar__close:hover {
  background-color: var(--color-bg);
  color: var(--text-primary);
}

.sidebar__close svg {
  width: 20px;
  height: 20px;
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              transform var(--transition-fast);
}

.sidebar__link:hover,
.sidebar__link.active {
  background-color: var(--color-primary-alpha);
  color: var(--color-primary);
  transform: translateX(4px);
}

.sidebar__link-num {
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  color: var(--color-primary);
  background-color: var(--color-primary-alpha);
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar__footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-light);
  flex-shrink: 0;
}

.sidebar__cta {
  display: block;
  width: 100%;
  text-align: center;
  padding: var(--space-4);
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border-radius: var(--radius-lg);
  font-weight: var(--fw-semibold);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.sidebar__cta:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-primary);
}

/* ============================================================
   7. HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  background-color: var(--color-secondary);
  overflow: hidden;
  padding-top: var(--header-height);
}

/* Animated background grid */
.hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 102, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 102, 255, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0%   { transform: translateY(0); }
  100% { transform: translateY(60px); }
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: glowPulse 6s ease-in-out infinite alternate;
}

.hero__glow--1 {
  width: 600px;
  height: 600px;
  background: var(--color-primary);
  top: -200px;
  right: -100px;
}

.hero__glow--2 {
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  bottom: -100px;
  left: -50px;
  animation-delay: -3s;
}

@keyframes glowPulse {
  0%   { opacity: 0.1; transform: scale(1); }
  100% { opacity: 0.2; transform: scale(1.1); }
}

/* Floating particles */
.hero__particles {
  position: absolute;
  inset: 0;
}

.hero__particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background-color: var(--color-primary);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat var(--duration, 8s) var(--delay, 0s) ease-in-out infinite;
}

@keyframes particleFloat {
  0%   { opacity: 0; transform: translateY(0) scale(0); }
  10%  { opacity: 0.6; transform: translateY(-20px) scale(1); }
  90%  { opacity: 0.3; transform: translateY(-200px) scale(0.5); }
  100% { opacity: 0; transform: translateY(-220px) scale(0); }
}

/* Hero Content */
.hero__content {
  position: relative;
  z-index: var(--z-base);
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: rgba(0, 102, 255, 0.15);
  border: 1px solid rgba(0, 102, 255, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-6);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-success);
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.hero__title {
  font-size: clamp(var(--fs-4xl), 6vw, var(--fs-7xl));
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  color: var(--text-inverse);
  line-height: 1.05;
  margin-bottom: var(--space-6);
}

.hero__title-highlight {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(var(--fs-base), 2vw, var(--fs-xl));
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--lh-relaxed);
  max-width: 600px;
  margin-bottom: var(--space-10);
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.4);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  animation: scrollBounce 2s ease-in-out infinite;
}

.hero__scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: var(--space-1);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   8. BUTTON SYSTEM
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  line-height: 1;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
  min-height: 48px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before {
  opacity: 1;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: var(--shadow-primary-lg);
  transform: translateY(-2px);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--outline {
  background-color: transparent;
  color: var(--text-inverse);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn--outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

.btn--outline-dark {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline-dark:hover {
  background-color: var(--color-primary);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--fs-lg);
  min-height: 56px;
}

.btn--sm {
  padding: var(--space-2) var(--space-5);
  font-size: var(--fs-sm);
  min-height: 40px;
}

.btn-arrow {
  display: inline-flex;
  align-items: center;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* ============================================================
   9. PARTNERS SECTION
   ============================================================ */
.partners {
  padding-block: var(--space-16);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--border-light);
}

.partners__label {
  text-align: center;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-8);
}

.partners__grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-6) var(--space-10);
}

.partner-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  background-color: var(--color-surface);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
  cursor: default;
  min-width: 140px;
  justify-content: center;
}

.partner-logo:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha);
  transform: translateY(-2px);
}

.partner-logo__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.partner-logo__name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--text-secondary);
  letter-spacing: var(--ls-tight);
}

/* ============================================================
   10. SERVICES SECTION
   ============================================================ */
.services {
  background-color: var(--color-bg);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.service-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card__icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary-alpha), var(--color-accent-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  transition: transform var(--transition-spring);
}

.service-card:hover .service-card__icon {
  transform: scale(1.1) rotate(-5deg);
}

.service-card__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.service-card__number {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: var(--fs-4xl);
  font-weight: var(--fw-black);
  color: var(--border-light);
  line-height: 1;
  transition: color var(--transition-base);
}

.service-card:hover .service-card__number {
  color: var(--color-primary-alpha);
}

.service-card__title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: var(--ls-snug);
}

.service-card__desc {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-5);
}

.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.service-tag {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--color-primary);
  background-color: var(--color-primary-alpha);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

/* ============================================================
   11. ABOUT SECTION
   ============================================================ */
.about {
  background-color: var(--color-surface);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about__content {
  /* left column */
}

.about__label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-primary);
  background-color: var(--color-primary-alpha);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.about__title {
  font-size: clamp(var(--fs-3xl), 4vw, var(--fs-5xl));
  font-weight: var(--fw-extrabold);
  letter-spacing: var(--ls-snug);
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  line-height: var(--lh-tight);
}

.about__text {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-4);
}

.about__values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.about__value {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
}

.about__value-icon {
  width: 36px;
  height: 36px;
  background-color: var(--color-primary-alpha);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about__value-icon svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

.about__value-text {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
}

/* Stats Grid */
.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.stat-card {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-soft) 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.stat-card__number {
  font-size: clamp(var(--fs-3xl), 4vw, var(--fs-5xl));
  font-weight: var(--fw-black);
  color: var(--text-inverse);
  line-height: 1;
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card__label {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.6);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
}

/* ============================================================
   12. PORTFOLIO SECTION
   ============================================================ */
.portfolio {
  background-color: var(--color-bg);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.portfolio-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
  display: flex;
  flex-direction: column;
}

.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}

.portfolio-card__visual {
  height: 200px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-card__visual-bg {
  position: absolute;
  inset: 0;
  transition: transform var(--transition-slow);
}

.portfolio-card:hover .portfolio-card__visual-bg {
  transform: scale(1.05);
}

.portfolio-card__visual-icon {
  position: relative;
  z-index: 1;
  width: 64px;
  height: 64px;
  background-color: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.portfolio-card__visual-icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

.portfolio-card__body {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.portfolio-card__category {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.portfolio-card__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: var(--ls-snug);
}

.portfolio-card__desc {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  flex: 1;
  margin-bottom: var(--space-4);
}

.portfolio-card__stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.stack-tag {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  background-color: var(--color-bg);
  border: 1px solid var(--border-light);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

/* Portfolio card gradient themes */
.portfolio-card--1 .portfolio-card__visual-bg {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.portfolio-card--2 .portfolio-card__visual-bg {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}
.portfolio-card--3 .portfolio-card__visual-bg {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}
.portfolio-card--4 .portfolio-card__visual-bg {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}
.portfolio-card--5 .portfolio-card__visual-bg {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}
.portfolio-card--6 .portfolio-card__visual-bg {
  background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
}

/* ============================================================
   13. PROCESS / METHODOLOGY SECTION
   ============================================================ */
.process {
  background-color: var(--color-secondary);
  position: relative;
  overflow: hidden;
}

.process::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 102, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 102, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.process__timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
  z-index: var(--z-base);
}

.process__connector {
  position: absolute;
  top: 40px;
  left: calc(100% / 12);
  right: calc(100% / 12);
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(0, 102, 255, 0.3) 10%,
    rgba(0, 102, 255, 0.3) 90%,
    transparent 100%
  );
  z-index: 0;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: var(--z-base);
}

.process-step__num {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-2xl);
  font-weight: var(--fw-black);
  color: var(--text-inverse);
  margin-bottom: var(--space-5);
  box-shadow: 0 0 0 8px rgba(0, 102, 255, 0.1),
              var(--shadow-primary);
  transition: transform var(--transition-spring),
              box-shadow var(--transition-base);
  position: relative;
}

.process-step:hover .process-step__num {
  transform: scale(1.1);
  box-shadow: 0 0 0 12px rgba(0, 102, 255, 0.15),
              var(--shadow-primary-lg);
}

.process-step__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  color: var(--text-inverse);
  margin-bottom: var(--space-2);
  letter-spacing: var(--ls-snug);
}

.process-step__desc {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.5);
  line-height: var(--lh-relaxed);
}

/* ============================================================
   14. FAQ SECTION
   ============================================================ */
.faq {
  background-color: var(--color-surface);
}

.faq__list {
  max-width: 800px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.faq-item.open {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha);
}

.faq-item__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background-color: var(--color-surface);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  min-height: 64px;
}

.faq-item__question:hover {
  background-color: var(--color-bg);
}

.faq-item.open .faq-item__question {
  background-color: var(--color-primary-alpha);
}

.faq-item__q-text {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  line-height: var(--lh-snug);
}

.faq-item.open .faq-item__q-text {
  color: var(--color-primary);
}

.faq-item__icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background-color var(--transition-fast),
              transform var(--transition-base);
}

.faq-item.open .faq-item__icon {
  background-color: var(--color-primary);
  transform: rotate(45deg);
}

.faq-item__icon svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.faq-item.open .faq-item__icon svg {
  color: var(--text-inverse);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.open .faq-item__answer {
  max-height: 500px;
}

.faq-item__answer-inner {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  border-top: 1px solid var(--border-light);
  padding-top: var(--space-4);
}

/* ============================================================
   15. CONTACT SECTION
   ============================================================ */
.contact {
  background-color: var(--color-bg);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-16);
  align-items: start;
}

.contact__info {
  /* left column */
}

.contact__info-title {
  font-size: clamp(var(--fs-2xl), 3vw, var(--fs-4xl));
  font-weight: var(--fw-extrabold);
  letter-spacing: var(--ls-snug);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.contact__info-text {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-8);
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  margin-bottom: var(--space-3);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact__detail:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha);
}

.contact__detail-icon {
  width: 44px;
  height: 44px;
  background-color: var(--color-primary-alpha);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact__detail-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
}

.contact__detail-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact__detail-value {
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
}

/* Social Links */
.contact__social {
  margin-top: var(--space-6);
}

.contact__social-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.social-links {
  display: flex;
  gap: var(--space-3);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.social-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.social-link--instagram:hover {
  background: linear-gradient(135deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  border-color: transparent;
  color: white;
}

.social-link--linkedin:hover {
  background-color: #0077b5;
  border-color: #0077b5;
  color: white;
}

.social-link--github:hover {
  background-color: #24292e;
  border-color: #24292e;
  color: white;
}

.social-link svg {
  width: 20px;
  height: 20px;
}

/* Contact Form */
.contact__form-wrapper {
  background-color: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-xl);
}

.contact__form-title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: var(--ls-snug);
}

.contact__form-subtitle {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-8);
}

/* Form Elements */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form__label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  letter-spacing: var(--ls-wide);
}

.form__label span {
  color: var(--color-error);
  margin-left: 2px;
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-lg);
  font-size: var(--fs-base);
  color: var(--text-primary);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background-color var(--transition-fast);
  min-height: 48px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--text-light);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha);
  background-color: var(--color-surface);
}

.form__input.error,
.form__textarea.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.form__input.success,
.form__textarea.success {
  border-color: var(--color-success);
  box-shadow: 0 0 0 3px rgba(39, 174, 96, 0.1);
}

.form__textarea {
  resize: vertical;
  min-height: 140px;
  line-height: var(--lh-relaxed);
}

.form__error {
  font-size: var(--fs-xs);
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 18px;
}

.form__error::before {
  content: '⚠';
  font-size: 10px;
}

.form__error:empty::before {
  display: none;
}

.form__submit {
  width: 100%;
  padding: var(--space-4);
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border-radius: var(--radius-lg);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  cursor: pointer;
  border: none;
  transition: background-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  position: relative;
  overflow: hidden;
}

.form__submit:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

.form__submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form__submit-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.form__submit.loading .form__submit-spinner {
  display: block;
}

.form__submit.loading .form__submit-text {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Form Messages */
.form__message {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  display: none;
  align-items: center;
  gap: var(--space-3);
}

.form__message.show {
  display: flex;
}

.form__message--success {
  background-color: rgba(39, 174, 96, 0.1);
  border: 1px solid rgba(39, 174, 96, 0.3);
  color: var(--color-success);
}

.form__message--error {
  background-color: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.3);
  color: var(--color-error);
}

/* ============================================================
   16. FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-secondary);
  color: rgba(255, 255, 255, 0.7);
  padding-top: var(--space-16);
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__brand {
  /* first column */
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  margin-bottom: var(--space-4);
}

.footer__logo-text {
  font-size: var(--fs-xl);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  color: var(--text-inverse);
}

.footer__logo-text span {
  color: var(--color-primary);
}

.footer__tagline {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.5);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-5);
}

.footer__social {
  display: flex;
  gap: var(--space-2);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-base);
}

.footer__social-link:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

.footer__social-link svg {
  width: 18px;
  height: 18px;
}

.footer__col-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--text-inverse);
  margin-bottom: var(--space-5);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.footer__link:hover {
  color: var(--color-primary-light);
  transform: translateX(4px);
}

.footer__bottom {
  padding-block: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer__copyright {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.35);
}

.footer__copyright a {
  color: var(--color-primary-light);
  transition: color var(--transition-fast);
}

.footer__copyright a:hover {
  color: var(--color-primary);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-5);
}

.footer__bottom-link {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.35);
  transition: color var(--transition-fast);
}

.footer__bottom-link:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================================
   17. SCROLL-TO-TOP BUTTON
   ============================================================ */
.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-primary);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition-base),
              visibility var(--transition-base),
              transform var(--transition-base),
              background-color var(--transition-fast),
              box-shadow var(--transition-fast);
  cursor: pointer;
  border: none;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-primary-lg);
  transform: translateY(-2px);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   18. REVEAL ANIMATIONS (Intersection Observer)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal--left {
  transform: translateX(-30px);
}

.reveal--left.revealed {
  transform: translateX(0);
}

.reveal--right {
  transform: translateX(30px);
}

.reveal--right.revealed {
  transform: translateX(0);
}

.reveal--scale {
  transform: scale(0.9);
}

.reveal--scale.revealed {
  transform: scale(1);
}

/* Stagger delays for grid items */
.reveal-stagger > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-stagger > *:nth-child(4) { transition-delay: 0.2s; }
.reveal-stagger > *:nth-child(5) { transition-delay: 0.25s; }
.reveal-stagger > *:nth-child(6) { transition-delay: 0.3s; }

/* ============================================================
   19. LOADING SCREEN
   ============================================================ */
.page-loader {
  position: fixed;
  inset: 0;
  background-color: var(--color-secondary);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-4);
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.page-loader__logo {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-black);
  color: var(--text-inverse);
  letter-spacing: var(--ls-tight);
}

.page-loader__logo span {
  color: var(--color-primary);
}

.page-loader__bar {
  width: 200px;
  height: 3px;
  background-color: rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.page-loader__bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  animation: loadBar 1.5s ease-in-out forwards;
}

@keyframes loadBar {
  0%   { width: 0%; }
  60%  { width: 80%; }
  100% { width: 100%; }
}

/* ============================================================
   20. MISCELLANEOUS & POLISH
   ============================================================ */

/* Selection color */
::selection {
  background-color: var(--color-primary);
  color: white;
}

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Smooth scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Divider */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-light), transparent);
  margin-block: var(--space-8);
}

/* Gradient text utility */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
}

.badge--primary {
  background-color: var(--color-primary-alpha);
  color: var(--color-primary);
}

.badge--success {
  background-color: rgba(39, 174, 96, 0.1);
  color: var(--color-success);
}

/* Notification toast */
.toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background-color: var(--color-secondary);
  color: var(--text-inverse);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-toast);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Body lock when sidebar is open */
body.sidebar-open {
  overflow: hidden;
}