/* A Formulation of Truth - Three Theme System */
/* Tamas | Nīla | Uruvam */

/* ============================================ */
/* BASE RESET & COMMON STYLES */
/* ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Theme transition */
  --transition-speed: 0.3s;
}

body {
  font-family: 'Georgia', serif;
  min-height: 100vh;
  transition: background-color var(--transition-speed) ease,
              color var(--transition-speed) ease;
}

/* ============================================ */
/* TAMAS THEME (Default Dark) */
/* ============================================ */

body[data-theme="tamas"],
body:not([data-theme]) {
  --bg-primary: #000000;      /* Pure black void */
  --bg-secondary: #0a0a0a;    /* Near-black surface */
  --bg-card: rgba(10, 10, 10, 0.9);
  --text-primary: #e0e0ff;    /* Very light lavender */
  --text-secondary: #00d9ff;  /* Electric blue */
  --accent-1: #00d9ff;        /* Electric blue */
  --accent-2: #8b00ff;        /* Deep psychedelic purple */
  --accent-3: #00ff41;        /* Toxic neon green */
  --border-color: rgba(0, 217, 255, 0.3);
  --shadow-color: rgba(0, 0, 0, 0.9);
  --glow-1: rgba(0, 217, 255, 0.8);
  --glow-2: rgba(139, 0, 255, 0.8);
  --glow-3: rgba(0, 255, 65, 0.8);

  background-color: var(--bg-primary);
  color: var(--text-primary);
}

/* ============================================ */
/* NĪLA THEME - Neon Electric */
/* ============================================ */

body[data-theme="nila"] {
  --bg-primary: #0a0a0a;      /* Deep black for neon contrast */
  --bg-secondary: #1a1a1a;    /* Elevated black */
  --bg-card: rgba(26, 26, 26, 0.9);
  --text-primary: #ffffff;    /* Pure white for readability */
  --text-secondary: #e0e0e0;  /* Slightly dimmed white */
  --accent-1: #00FFFF;        /* Electric cyan */
  --accent-2: #FF0080;        /* Hot pink/magenta */
  --accent-3: #FF5500;        /* Neon orange */
  --accent-4: #CCFF00;        /* Neon yellow-lime */
  --border-color: rgba(0, 255, 255, 0.3);
  --shadow-color: rgba(0, 0, 0, 0.8);
  --glow-1: rgba(0, 255, 255, 0.8);
  --glow-2: rgba(255, 0, 128, 0.8);
  --glow-3: rgba(255, 85, 0, 0.8);
  --glow-4: rgba(204, 255, 0, 0.8);

  background-color: var(--bg-primary);
  color: var(--text-primary);
}

/* ============================================ */
/* URUVAM THEME (Electrified Neon Void) */
/* ============================================ */

body[data-theme="uruvam"] {
  --bg-primary: #050508;      /* Deepest void - almost true black */
  --bg-secondary: #0a0a0f;    /* Elevated void */
  --bg-card: rgba(10, 10, 15, 0.85);
  --text-primary: #e8e8ff;    /* Very light lavender */
  --text-secondary: #b8b8d8;  /* Dimmed lavender */
  --accent-1: #9d4edd;        /* Electric purple */
  --accent-2: #ffea00;        /* Electric yellow */
  --accent-3: #00ff66;        /* Deep electric green */
  --accent-4: #ff1744;        /* Deep electric red */
  --border-color: rgba(157, 78, 221, 0.4);
  --shadow-color: rgba(5, 5, 8, 0.9);
  --glow-1: rgba(157, 78, 221, 0.9);     /* Purple glow */
  --glow-2: rgba(255, 234, 0, 0.9);      /* Yellow glow */
  --glow-3: rgba(0, 255, 102, 0.9);      /* Green glow */
  --glow-4: rgba(255, 23, 68, 0.9);      /* Red glow */

  background-color: var(--bg-primary);
  color: var(--text-primary);
}

/* ============================================ */
/* THEME TOGGLE BUTTON */
/* ============================================ */

.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 50px;
  padding: 0.5rem;
  display: flex;
  gap: 0.5rem;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px var(--shadow-color);
}

.theme-btn {
  background: transparent;
  border: 2px solid transparent;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  cursor: pointer;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.3s ease;
  color: var(--text-secondary);
}

.theme-btn:hover {
  transform: scale(1.05);
}

.theme-btn.active {
  color: var(--text-primary);
  border-color: var(--accent-1);
  box-shadow: 0 0 10px var(--glow-1);
}

/* Tamas button colors */
body[data-theme="tamas"] .theme-btn[data-theme="tamas"],
body:not([data-theme]) .theme-btn[data-theme="tamas"] {
  color: #00d9ff;
  border-color: #00d9ff;
  box-shadow: 0 0 20px rgba(0, 217, 255, 1);
  text-shadow: 0 0 10px rgba(0, 217, 255, 0.8);
}

/* Nīla button colors - Neon cyan */
body[data-theme="nila"] .theme-btn[data-theme="nila"] {
  color: #00FFFF;
  border-color: #00FFFF;
  box-shadow: 0 0 20px rgba(0, 255, 255, 1);
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.8);
}

/* Uruvam button colors - Electric purple */
body[data-theme="uruvam"] .theme-btn[data-theme="uruvam"] {
  color: #9d4edd;
  border-color: #9d4edd;
  box-shadow: 0 0 20px rgba(157, 78, 221, 1);
  text-shadow: 0 0 10px rgba(157, 78, 221, 0.8);
}

/* ============================================ */
/* TYPOGRAPHY */
/* ============================================ */

h1, h2, h3 {
  font-family: 'Orbitron', sans-serif;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 600;
}

p {
  line-height: 1.8;
  font-size: 1.1rem;
}

a {
  color: var(--accent-1);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  text-shadow: 0 0 8px var(--glow-1);
}

/* ============================================ */
/* HERO SECTION */
/* ============================================ */

.hero {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 4rem 1rem;
  position: relative;
}

/* Tamas gradient - Psychedelic void */
body[data-theme="tamas"] .hero,
body:not([data-theme]) .hero {
  background: radial-gradient(
    1200px 600px at 50% 10%,
    rgba(139, 0, 255, 0.3) 0%,
    rgba(0, 217, 255, 0.2) 40%,
    rgba(0, 255, 65, 0.1) 60%,
    transparent 80%
  );
}

/* Nīla gradient - Electric neon glow */
body[data-theme="nila"] .hero {
  background: radial-gradient(
    1200px 600px at 50% 10%,
    rgba(0, 255, 255, 0.25) 0%,
    rgba(255, 0, 128, 0.15) 40%,
    transparent 70%
  );
}

/* Uruvam gradient - Electrified neon void */
body[data-theme="uruvam"] .hero {
  background: radial-gradient(
    1200px 600px at 50% 10%,
    rgba(157, 78, 221, 0.3) 0%,
    rgba(255, 234, 0, 0.15) 30%,
    rgba(0, 255, 102, 0.1) 50%,
    rgba(255, 23, 68, 0.08) 65%,
    transparent 80%
  );
}

.hero-title {
  text-align: center;
  margin: 0 0 0.5rem;
  text-shadow: 0 0 16px var(--glow-1);
}

/* ============================================ */
/* OM SYMBOLS */
/* ============================================ */

.oms {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin: 0.5rem 0 1.5rem;
  font-size: clamp(1.2rem, 2.6vw, 1.8rem);
  font-weight: 700;
}

.om {
  font-weight: bold;
  color: var(--accent-2);
  filter: drop-shadow(0 0 6px var(--glow-2));
  animation: pulse 3s ease-in-out infinite;
}

.oms .sup {
  position: relative;
  top: -0.4em;
}

.oms .sub {
  position: relative;
  top: 0.4em;
}

.oms .at {
  color: var(--accent-1);
  filter: drop-shadow(0 0 6px var(--glow-1));
}

.irendu {
  position: relative;
  top: -0.6em;
  font-size: 2rem;
  color: var(--accent-3);
  filter: drop-shadow(0 0 8px var(--glow-3));
}

/* ============================================ */
/* LOCKUP SECTION */
/* ============================================ */

.lockup {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  padding: 2.5rem 1rem;
}

.lockup-center {
  font-family: 'Orbitron', sans-serif;
  font-weight: 800;
  text-align: center;
  font-size: clamp(1.4rem, 3.8vw, 2.5rem);
  line-height: 1.15;
  white-space: nowrap;
  text-shadow: 0 0 10px var(--glow-1);
}

.lockup-tamil {
  font-family: 'Noto Sans Tamil', sans-serif;
  font-weight: 700;
  font-size: clamp(1.2rem, 3.2vw, 2.1rem);
  color: var(--accent-2);
  text-align: center;
  opacity: 0.95;
  text-shadow: 0 0 10px var(--glow-2);
}

.lockup-ukr {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: clamp(1.1rem, 3vw, 2rem);
  color: var(--accent-3);
  text-align: center;
  text-shadow: 0 0 10px var(--glow-3);
  display: flex;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
}

.flag-ua {
  width: 28px;
  height: 18px;
  display: inline-block;
  border-radius: 2px;
  background: linear-gradient(#0057b7 0 50%, #ffd700 50% 100%);
  box-shadow: 0 0 10px var(--glow-1);
  animation: flag-wave 2.2s ease-in-out infinite;
}

/* ============================================ */
/* CARDS & GRID */
/* ============================================ */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
  max-width: 1000px;
  width: 100%;
  padding: 0 1rem;
}

.card {
  display: block;
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  color: var(--text-primary);
  text-decoration: none;
  text-align: center;
  font-weight: 600;
  min-height: 200px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px var(--shadow-color);
}

.card:hover {
  border-color: var(--accent-1);
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 32px var(--glow-1);
}

.card h3 {
  color: var(--accent-1);
  margin-bottom: 1rem;
}

/* ============================================ */
/* BUTTONS */
/* ============================================ */

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--bg-card);
  border: 2px solid var(--accent-1);
  border-radius: 50px;
  color: var(--accent-1);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn:hover {
  background: var(--accent-1);
  color: var(--bg-primary);
  box-shadow: 0 0 20px var(--glow-1);
  transform: scale(1.05);
}

.btn-primary {
  background: var(--accent-1);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent-1);
}

/* ============================================ */
/* ANIMATIONS */
/* ============================================ */

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

@keyframes flag-wave {
  0%, 100% { transform: rotate(0deg) skewY(0deg); }
  50% { transform: rotate(-4deg) skewY(-2deg); }
}

/* ============================================ */
/* NĪLA THEME SPECIFIC OVERRIDES */
/* ============================================ */

/* "you are this moment" - Neon orange */
body[data-theme="nila"] .hero-title {
  color: #FF5500;
  text-shadow: 0 0 20px rgba(255, 85, 0, 1), 0 0 40px rgba(255, 85, 0, 0.6);
}

/* Tamil text "உண்மையை சூத்திரம்" - Hot pink/magenta */
body[data-theme="nila"] .lockup-tamil {
  color: #FF0080;
  text-shadow: 0 0 20px rgba(255, 0, 128, 1), 0 0 40px rgba(255, 0, 128, 0.6);
}

/* "|| a formulation of truth ||" - Electric cyan */
body[data-theme="nila"] .lockup-center {
  color: #00FFFF;
  text-shadow: 0 0 20px rgba(0, 255, 255, 1), 0 0 40px rgba(0, 255, 255, 0.6);
}

/* Ukrainian text "формулювання істини" - Neon yellow-lime */
body[data-theme="nila"] .lockup-ukr {
  color: #CCFF00;
  text-shadow: 0 0 20px rgba(204, 255, 0, 1), 0 0 40px rgba(204, 255, 0, 0.6);
}

/* Top Tamil/Devanagari symbol ௨ - Hot pink to match energy */
body[data-theme="nila"] .hero div[style*="Noto Sans Tamil"] {
  color: #FF69B4 !important;
  text-shadow: 0 0 20px rgba(255, 105, 180, 1), 0 0 40px rgba(255, 105, 180, 0.6) !important;
}

/* Links - Neon cyan */
body[data-theme="nila"] a {
  color: #00FFFF;
}

body[data-theme="nila"] a:hover {
  text-shadow: 0 0 15px rgba(0, 255, 255, 1);
}

/* ============================================ */
/* URUVAM THEME SPECIFIC OVERRIDES */
/* ============================================ */

/* "you are this moment" - Electric yellow */
body[data-theme="uruvam"] .hero-title {
  color: #ffea00;
  text-shadow: 0 0 20px rgba(255, 234, 0, 1), 0 0 40px rgba(255, 234, 0, 0.6);
}

/* Tamil text "உண்மையை சூத்திரம்" - Electric purple */
body[data-theme="uruvam"] .lockup-tamil {
  color: #9d4edd;
  text-shadow: 0 0 20px rgba(157, 78, 221, 1), 0 0 40px rgba(157, 78, 221, 0.6);
}

/* "|| a formulation of truth ||" - Deep electric green */
body[data-theme="uruvam"] .lockup-center {
  color: #00ff66;
  text-shadow: 0 0 20px rgba(0, 255, 102, 1), 0 0 40px rgba(0, 255, 102, 0.6);
}

/* Ukrainian text "формулювання істини" - Deep electric red */
body[data-theme="uruvam"] .lockup-ukr {
  color: #ff1744;
  text-shadow: 0 0 20px rgba(255, 23, 68, 1), 0 0 40px rgba(255, 23, 68, 0.6);
}

/* Top Tamil/Devanagari symbol ௨ - Electric purple to match energy */
body[data-theme="uruvam"] .hero div[style*="Noto Sans Tamil"] {
  color: #c77dff !important;
  text-shadow: 0 0 20px rgba(199, 125, 255, 1), 0 0 40px rgba(199, 125, 255, 0.6) !important;
}

/* Links - Electric purple */
body[data-theme="uruvam"] a {
  color: #9d4edd;
}

body[data-theme="uruvam"] a:hover {
  text-shadow: 0 0 15px rgba(157, 78, 221, 1);
}

/* ============================================ */
/* RESPONSIVE */
/* ============================================ */

@media (max-width: 768px) {
  .theme-toggle {
    top: 1rem;
    right: 1rem;
    padding: 0.4rem;
    gap: 0.3rem;
  }

  .theme-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
  }

  .lockup {
    padding: 2rem 0.5rem;
  }

  .lockup-tamil,
  .lockup-ukr {
    font-size: 0.85rem;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}