/* ============================================
   APPTIARY — Design System & Component Styles
   ============================================ */

/* ------------------------------------------
   1. Custom Properties — Palette
   ------------------------------------------ */
:root {
  /* Blue */
  --palette-blue-50: #EFF6FF;
  --palette-blue-100: #DBEAFE;
  --palette-blue-200: #BFDBFE;
  --palette-blue-300: #93C5FD;
  --palette-blue-400: #60A5FA;
  --palette-blue-500: #3B82F6;
  --palette-blue-600: #2563EB;
  --palette-blue-700: #1D4ED8;
  --palette-blue-800: #1E40AF;
  --palette-blue-900: #1E3A8A;

  /* Amber */
  --palette-amber-300: #FCD34D;
  --palette-amber-400: #FBBF24;
  --palette-amber-500: #F59E0B;
  --palette-amber-600: #D97706;

  /* Slate */
  --palette-slate-50: #F8FAFC;
  --palette-slate-100: #F1F5F9;
  --palette-slate-200: #E2E8F0;
  --palette-slate-300: #CBD5E1;
  --palette-slate-400: #94A3B8;
  --palette-slate-500: #64748B;
  --palette-slate-600: #475569;
  --palette-slate-700: #334155;
  --palette-slate-800: #1E293B;
  --palette-slate-900: #0F172A;
  --palette-slate-950: #020617;

  --palette-white: #FFFFFF;
  --palette-black: #000000;
}

/* ------------------------------------------
   1b. Custom Properties — Typography
   ------------------------------------------ */
:root {
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;

  /* 1.25 ratio type scale */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1.125rem; /* 18px */
  --text-lg: 1.25rem;    /* 20px */
  --text-xl: 1.5rem;     /* 24px */
  --text-2xl: 1.875rem;  /* 30px */
  --text-3xl: 2.25rem;   /* 36px */
  --text-4xl: 3rem;      /* 48px */
  --text-5xl: 3.75rem;   /* 60px */

  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  --leading-tight: 1.1;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
}

/* ------------------------------------------
   1c. Custom Properties — Spacing & Layout
   ------------------------------------------ */
:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --container-max: 1200px;
  --container-padding: var(--space-6);

  --header-height: 72px;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
}

/* ------------------------------------------
   1d. Custom Properties — Animation
   ------------------------------------------ */
:root {
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-reveal: 700ms;
}

/* ------------------------------------------
   1e. Semantic Theme Tokens — Light (default)
   ------------------------------------------ */
:root {
  --color-brand-primary: var(--palette-blue-600);
  --color-brand-primary-hover: var(--palette-blue-700);
  --color-brand-primary-light: var(--palette-blue-50);
  --color-brand-accent: var(--palette-amber-500);
  --color-brand-accent-hover: var(--palette-amber-600);

  --color-text-primary: var(--palette-slate-900);
  --color-text-secondary: var(--palette-slate-600);
  --color-text-tertiary: var(--palette-slate-400);
  --color-text-inverse: var(--palette-white);
  --color-text-on-primary: var(--palette-white);

  --color-bg-primary: var(--palette-white);
  --color-bg-secondary: var(--palette-slate-50);
  --color-bg-tertiary: var(--palette-slate-100);
  --color-bg-inverse: var(--palette-slate-900);

  --color-border-primary: var(--palette-slate-200);
  --color-border-secondary: var(--palette-slate-100);

  --color-logo-text: var(--palette-slate-900);
  --color-logo-hex: var(--palette-amber-500);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-header: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* ------------------------------------------
   2. Dark Theme Overrides
   ------------------------------------------ */
[data-theme="dark"] {
  --color-brand-primary: var(--palette-blue-400);
  --color-brand-primary-hover: var(--palette-blue-300);
  --color-brand-primary-light: rgba(59, 130, 246, 0.1);
  --color-brand-accent: var(--palette-amber-400);
  --color-brand-accent-hover: var(--palette-amber-300);

  --color-text-primary: var(--palette-slate-100);
  --color-text-secondary: var(--palette-slate-300);
  --color-text-tertiary: var(--palette-slate-500);
  --color-text-inverse: var(--palette-slate-900);
  --color-text-on-primary: var(--palette-slate-900);

  --color-bg-primary: var(--palette-slate-900);
  --color-bg-secondary: var(--palette-slate-800);
  --color-bg-tertiary: var(--palette-slate-700);
  --color-bg-inverse: var(--palette-slate-50);

  --color-border-primary: var(--palette-slate-700);
  --color-border-secondary: var(--palette-slate-800);

  --color-logo-text: var(--palette-slate-100);
  --color-logo-hex: var(--palette-amber-400);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-header: 0 1px 3px rgba(0, 0, 0, 0.4);
}

/* ------------------------------------------
   3. CSS Reset & Base Styles
   ------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--duration-normal) var(--ease-out),
              color var(--duration-normal) var(--ease-out);
}

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

a {
  color: var(--color-brand-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

ul, ol {
  list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

/* ------------------------------------------
   4. Utilities
   ------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 1000;
  padding: var(--space-3) var(--space-6);
  background: var(--color-brand-primary);
  color: var(--color-text-on-primary);
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  transition: top var(--duration-fast);
}

.skip-link:focus {
  top: var(--space-4);
  color: var(--color-text-on-primary);
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

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

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

.reveal--scale {
  transform: scale(0.95);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* Section utility */
.section {
  padding: var(--space-24) 0;
}

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

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

.section__title {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-4xl));
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-brand-primary);
  color: var(--color-text-on-primary);
  box-shadow: var(--shadow-md);
}

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

.btn--large {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}

.btn--outline {
  border: 2px solid var(--color-brand-primary);
  color: var(--color-brand-primary);
  background: transparent;
}

.btn--outline:hover {
  background: var(--color-brand-primary);
  color: var(--color-text-on-primary);
  transform: translateY(-2px);
}

/* ------------------------------------------
   5. Components — Header
   ------------------------------------------ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-bg-primary);
  transition: background-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.header--scrolled {
  box-shadow: var(--shadow-header);
}

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

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: var(--font-bold);
  color: var(--color-logo-text);
  letter-spacing: var(--tracking-tight);
}

.logo:hover {
  color: var(--color-logo-text);
}

.logo__text {
  color: var(--color-logo-text);
  transition: color var(--duration-normal) var(--ease-out);
}

.logo__hex {
  transition: fill var(--duration-normal) var(--ease-out);
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-brand-primary);
  transition: width var(--duration-normal) var(--ease-out);
}

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

.nav__link:hover::after {
  width: 100%;
}

/* Header controls */
.header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  padding: var(--space-1);
}

.lang-switcher__btn {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  text-transform: uppercase;
}

.lang-switcher__btn:hover {
  color: var(--color-text-primary);
}

.lang-switcher__btn--active {
  background: var(--color-brand-primary);
  color: var(--color-text-on-primary);
}

.lang-switcher__btn--active:hover {
  color: var(--color-text-on-primary);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.theme-toggle:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle__icon--sun {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--moon {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  gap: 5px;
  background: transparent;
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-primary);
  z-index: 99;
  padding: var(--space-8) var(--space-6);
  overflow-y: auto;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.mobile-nav--open {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  opacity: 1;
  transform: translateY(0);
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-nav__link {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-secondary);
}

.mobile-nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
}

/* ------------------------------------------
   5b. Components — Hero
   ------------------------------------------ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  background-color: var(--color-bg-primary);
  overflow: hidden;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-8);
  padding: var(--space-16) 0;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  opacity: 0;
  transform: translateY(20px);
}

.hero__title {
  font-size: clamp(var(--text-3xl), 8vw, var(--text-5xl));
  font-weight: var(--font-extrabold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  max-width: 800px;
  opacity: 0;
  transform: translateY(20px);
}

.hero__title-accent {
  color: var(--color-brand-primary);
}

.hero__description {
  font-size: clamp(var(--text-base), 2.5vw, var(--text-lg));
  color: var(--color-text-secondary);
  max-width: 600px;
  line-height: var(--leading-relaxed);
  opacity: 0;
  transform: translateY(20px);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  opacity: 0;
  transform: translateY(20px);
}

.hero--animated .hero__badge,
.hero--animated .hero__title,
.hero--animated .hero__description,
.hero--animated .hero__actions {
  animation: heroFadeIn var(--duration-reveal) var(--ease-out) forwards;
}

.hero--animated .hero__badge { animation-delay: 0ms; }
.hero--animated .hero__title { animation-delay: 150ms; }
.hero--animated .hero__description { animation-delay: 300ms; }
.hero--animated .hero__actions { animation-delay: 450ms; }

/* ------------------------------------------
   5c. Components — Services
   ------------------------------------------ */
.services__grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--space-8);
}

.service-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.service-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
}

.service-card__icon svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
}

.service-card__description {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ------------------------------------------
   5d. Components — Process
   ------------------------------------------ */
.process__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  max-width: 700px;
  margin: 0 auto;
}

.process__timeline::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border-primary);
}

.process__step {
  display: flex;
  gap: var(--space-6);
  position: relative;
}

.process__step-number {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-primary);
  color: var(--color-text-on-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  z-index: 1;
}

.process__step-content {
  padding-top: var(--space-3);
}

.process__step-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-2);
}

.process__step-description {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ------------------------------------------
   5e. Components — Why Apptiary
   ------------------------------------------ */
.why__grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--space-8);
}

.why-card {
  text-align: center;
  padding: var(--space-8);
}

.why-card__icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
  border-radius: var(--radius-xl);
  margin: 0 auto var(--space-6);
}

.why-card__icon svg {
  width: 32px;
  height: 32px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.why-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
}

.why-card__description {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ------------------------------------------
   5e2. Components — References
   ------------------------------------------ */
.references__grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--space-8);
}

.reference-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.reference-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-brand-accent);
}

.reference-card__badge {
  display: inline-flex;
  align-self: flex-start;
  padding: var(--space-1) var(--space-3);
  background: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.reference-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
}

.reference-card__description {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  flex-grow: 1;
}

.reference-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-2);
}

.reference-card__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

/* ------------------------------------------
   5f. Components — About
   ------------------------------------------ */
.about__content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.about__text {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  font-size: var(--text-lg);
}

.about__text:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------
   5g. Components — CTA
   ------------------------------------------ */
.cta {
  background: var(--color-brand-primary);
  color: var(--color-text-on-primary);
  text-align: center;
  padding: var(--space-24) 0;
}

.cta__title {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-4xl));
  font-weight: var(--font-bold);
  color: var(--color-text-on-primary);
  margin-bottom: var(--space-4);
}

.cta__description {
  font-size: var(--text-lg);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto var(--space-10);
  line-height: var(--leading-relaxed);
}

.cta .btn--primary {
  background: var(--color-text-on-primary);
  color: var(--color-brand-primary);
}

.cta .btn--primary:hover {
  background: var(--palette-slate-100);
  box-shadow: var(--shadow-xl);
}

[data-theme="dark"] .cta .btn--primary {
  background: var(--palette-slate-900);
  color: var(--color-brand-primary);
}

[data-theme="dark"] .cta .btn--primary:hover {
  background: var(--palette-slate-800);
}

/* ------------------------------------------
   5h. Components — Footer
   ------------------------------------------ */
.footer {
  background: var(--color-bg-inverse);
  color: var(--color-text-inverse);
  padding: var(--space-16) 0 var(--space-2);
}

[data-theme="dark"] .footer {
  background: var(--palette-slate-950);
  color: var(--palette-slate-100);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.footer__brand {
  max-width: 400px;
}

.footer__brand .logo {
  margin-bottom: var(--space-4);
}

.footer__brand-text {
  color: var(--palette-slate-400);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-10);
  text-align: right;

}

.footer__nav-group h4 {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--palette-slate-300);
  margin-bottom: var(--space-4);
}

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

.footer__nav-group a {
  font-size: var(--text-sm);
  color: var(--palette-slate-400);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__nav-group a:hover {
  color: var(--palette-white);
}

.footer__bottom {
  padding-top: var(--space-2);
  border-top: 1px solid var(--palette-slate-800);
  text-align: center;
}

.footer__copy {
  font-size: var(--text-sm);
  color: var(--palette-slate-500);
}

.footer__address {
  font-style: normal;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-top: var(--space-4);
}

.footer__address-line {
  font-size: var(--text-sm);
  color: var(--palette-slate-400);
  display: block;
}

.footer__address-line--legal {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--palette-slate-500);
}

.footer__address-line--legal + .footer__address-line--legal {
  margin-top: 0;
}

.footer__address-email {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-brand-accent);
  font-weight: var(--font-medium);
  margin-top: var(--space-3);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__address-email:hover {
  color: var(--color-brand-accent-hover);
}

/* ------------------------------------------
   6. Keyframe Animations
   ------------------------------------------ */
@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ------------------------------------------
   7. Responsive Breakpoints
   ------------------------------------------ */

/* Mobile: below 768px */
@media (max-width: 767px) {
  .hero__inner {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .footer__top {
    text-align: center;
    align-items: center;
  }

  .footer__brand {
    align-items: center;
    display: flex;
    flex-direction: column;
  }

  .footer__address {
    align-items: center;
  }

  .footer__nav {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .footer__nav-group ul {
    align-items: center;
  }

}

/* Tablet: 768px+ */
@media (min-width: 768px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .why__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .references__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__top {
    flex-direction: row;
    justify-content: space-between;
  }

}

/* Desktop: 1024px+ */
@media (min-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .why__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hamburger {
    display: none !important;
  }

  .nav {
    display: flex !important;
  }

  .mobile-nav {
    display: none !important;
  }
}

/* Below desktop: show hamburger, hide nav */
@media (max-width: 1023px) {
  .nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .header__controls {
    gap: var(--space-2);
  }

  .header__controls .lang-switcher {
    display: none;
  }
}

/* Wide: 1280px+ */
@media (min-width: 1280px) {
  :root {
    --container-max: 1280px;
  }
}

/* ------------------------------------------
   8. prefers-reduced-motion
   ------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__badge,
  .hero__title,
  .hero__description,
  .hero__actions {
    opacity: 1;
    transform: none;
  }
}