/* ==========================================================
   BASE.CSS — Design Tokens, Resets, Typography
   + Full Light / Dark Theme System
   Akritti Advertising | akritti.com
   ========================================================== */

/* --- Google Font Import --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800;900&family=Open+Sans:wght@400;500;600&display=swap');

/* ─────────────────────────────────────────────
   INVARIANT BRAND TOKENS (never change with theme)
───────────────────────────────────────────── */
:root {
  /* CMYK Brand Palette */
  --color-cyan:     #00A8E8;
  --color-magenta:  #E6007E;
  --color-yellow:   #FFDE00;

  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body:    'Open Sans', sans-serif;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Transitions */
  --transition-fast:   0.2s ease;
  --transition-smooth: 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-slow:   0.8s ease-out;
  --transition-theme:  0.35s ease;

  /* Radii */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-full: 9999px;

  /* Glow shadows (always accent-colored) */
  --shadow-glow-cyan:    0 0 24px rgba(0, 168, 232, 0.45);
  --shadow-glow-magenta: 0 0 24px rgba(230, 0, 126, 0.45);
  --shadow-glow-yellow:  0 0 24px rgba(255, 222, 0, 0.4);
}

/* ─────────────────────────────────────────────
   DARK THEME (default)
───────────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --bg-base:     #000000;
  --bg-alt:      #0d0d0d;
  --bg-alt2:     #111111;
  --bg-card:     #1a1a24;
  --bg-glass:    rgba(255,255,255,0.04);
  --bg-glass-hv: rgba(255,255,255,0.07);

  --border:      rgba(255,255,255,0.08);
  --border-hv:   rgba(255,255,255,0.18);

  --text-primary:   #ffffff;
  --text-secondary: rgba(255,255,255,0.78);
  --text-muted:     #9ca3af;
  --text-faint:     rgba(255,255,255,0.2);

  --shadow-card: 0 2px 16px rgba(0,0,0,0.4);
  --shadow-lift: 0 8px 24px rgba(0,0,0,0.5);
  --scrollbar-thumb: #333;

  /* Input fields */
  --input-bg:      rgba(255,255,255,0.05);
  --input-border:  rgba(255,255,255,0.1);
  --input-text:    #ffffff;
  --input-ph:      rgba(255,255,255,0.25);

  /* Navbar */
  --nav-scrolled-bg: rgba(0,0,0,0.92);

  /* Hero gradient */
  --hero-grad-bg: #000000;
  --orb-opacity:  0.15;

  /* Select option bg */
  --select-option-bg: #111;
}

/* ─────────────────────────────────────────────
   LIGHT THEME
───────────────────────────────────────────── */
[data-theme="light"] {
  --bg-base:     #f7f7f4;
  --bg-alt:      #efefec;
  --bg-alt2:     #e6e6e2;
  --bg-card:     #ffffff;
  --bg-glass:    rgba(0,0,0,0.03);
  --bg-glass-hv: rgba(0,0,0,0.06);

  --border:      rgba(0,0,0,0.09);
  --border-hv:   rgba(0,0,0,0.18);

  --text-primary:   #0d0d12;
  --text-secondary: rgba(0,0,0,0.72);
  --text-muted:     #6b7280;
  --text-faint:     rgba(0,0,0,0.18);

  --shadow-card: 0 4px 32px rgba(0,0,0,0.1);
  --shadow-lift: 0 20px 40px rgba(0,0,0,0.15);
  --scrollbar-thumb: #ccc;

  --input-bg:      rgba(0,0,0,0.04);
  --input-border:  rgba(0,0,0,0.12);
  --input-text:    #0d0d12;
  --input-ph:      rgba(0,0,0,0.25);

  --nav-scrolled-bg: rgba(247,247,244,0.94);

  --hero-grad-bg: #f7f7f4;
  --orb-opacity:  0.08;

  --select-option-bg: #f0f0ee;
}

/* ─────────────────────────────────────────────
   GLOBAL THEME TRANSITION
───────────────────────────────────────────── */
*, *::before, *::after {
  transition: background-color var(--transition-theme),
              border-color     var(--transition-theme),
              color            var(--transition-theme),
              box-shadow       var(--transition-theme);
  /* Keep fast transitions for interactive elements */
  box-sizing: border-box;
  margin: 0; padding: 0;
}

/* Override: animations / transforms should NOT inherit theme transition */
.reveal,
.hero-orb,
.scroll-mouse-dot,
.contact-badge-dot,
.nav-hamburger span,
.btn {
  transition: unset;
}
.btn { transition: background var(--transition-smooth), color var(--transition-smooth), transform var(--transition-smooth), box-shadow var(--transition-smooth); }
.reveal { transition: opacity var(--transition-slow), transform var(--transition-slow); }
.hero-orb { transition: transform 8s ease-in-out; }

/* ─────────────────────────────────────────────
   BASE STYLES
───────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.65;
}

img, video { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

::selection { background: var(--color-magenta); color: #fff; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-alt); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-cyan); }

/* ─────────────────────────────────────────────
   TYPOGRAPHY
───────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* ─────────────────────────────────────────────
   LAYOUT
───────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.section    { padding: var(--space-3xl) 0; }
.section-sm { padding: var(--space-xl) 0; }

.section-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.section-desc {
  color: var(--text-muted);
  max-width: 560px;
  font-size: 1.05rem;
}

.section-divider {
  width: 60px; height: 3px;
  margin: var(--space-sm) 0;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-magenta), var(--color-yellow));
  border-radius: var(--radius-full);
}
/* In a centred section-header the divider should be centered too */
.section-header .section-divider {
  margin: var(--space-sm) auto;
}
.section-header .section-desc {
  max-width: 560px;
  margin: 0 auto;
}

/* ─────────────────────────────────────────────
   TEXT UTILITIES
───────────────────────────────────────────── */
.text-cyan    { color: var(--color-cyan); }
.text-magenta { color: var(--color-magenta); }
.text-yellow  { color: var(--color-yellow); }
.text-muted   { color: var(--text-muted); }
.text-primary { color: var(--text-primary); }

.text-gradient {
  background: linear-gradient(135deg, var(--color-cyan), var(--color-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─────────────────────────────────────────────
   BUTTONS
───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-magenta);
  color: #fff;
}
.btn-primary:hover {
  background: var(--text-primary);
  color: var(--bg-base);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-magenta);
}

.btn-outline {
  border: 2px solid var(--border-hv);
  color: var(--text-primary);
}
.btn-outline:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-cyan);
}

.btn-white {
  background: var(--text-primary);
  color: var(--bg-base);
}
.btn-white:hover {
  background: var(--color-cyan);
  color: #fff;
  transform: translateY(-3px);
}

/* ─────────────────────────────────────────────
   GLASS CARD
───────────────────────────────────────────── */
.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
}

/* ─────────────────────────────────────────────
   SCROLL REVEAL
───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal.from-left  { transform: translateX(-40px); }
.reveal.from-right { transform: translateX(40px); }
.reveal.is-visible { opacity: 1; transform: translate(0, 0); }

.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.2s; }
.reveal-d3 { transition-delay: 0.3s; }
.reveal-d4 { transition-delay: 0.4s; }
.reveal-d5 { transition-delay: 0.5s; }

/* ─────────────────────────────────────────────
   HOVER LIFT
───────────────────────────────────────────── */
.hover-lift {
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}
.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lift);
}

/* ─────────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────────── */
@media (max-width: 768px) {
  .container { padding: 0 var(--space-md); }
  .section   { padding: var(--space-2xl) 0; }
}
@media (max-width: 400px) {
  .container { padding: 0 var(--space-sm); }
}
/* Visually hide element but keep for screen readers and SEO */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0,0,0,0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}