/* ============================================
   AURALEN SPARK — Design System
   Premium, Human-Centered Design
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&display=swap');

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* === Spark Glow Design System === */
  /* Primary Colors */
  --color-spark-teal: #3DE0D4;        /* Spark Teal Glow - main accent, buttons, CTAs */
  --color-deep-aqua: #075F73;         /* Deep Aqua - dark teal variant, backgrounds */
  --color-orchid: #A057E8;            /* Orchid Purple - secondary accent, highlights */
  
  /* Supporting Colors */
  --color-soft-lilac: #C9A9FF;        /* Soft Lilac - tertiary accent, gradients */
  --color-mist-white: #F9FAFB;        /* Mist White - light backgrounds */
  --color-charcoal: #0D0D0F;          /* Charcoal - dark backgrounds, text */

  /* Teal Scale (derived from Spark Teal) */
  --color-teal-100: #e0faf8;
  --color-teal-200: #b3f4ee;
  --color-teal-300: #80ede2;
  --color-teal-400: #3DE0D4;          /* Spark Teal Glow */
  --color-teal-500: #2bc4ba;
  --color-teal-600: #1da89f;
  --color-teal-700: #075F73;          /* Deep Aqua */

  /* Purple Scale (derived from Orchid) */
  --color-purple-100: #f2ebff;
  --color-purple-200: #e0d1ff;
  --color-purple-300: #C9A9FF;        /* Soft Lilac */
  --color-purple-400: #B77BF5;
  --color-purple-500: #A057E8;        /* Orchid Purple */
  --color-purple-600: #8844d6;
  --color-purple-700: #6e35b8;

  /* Backgrounds - Light Theme */
  --color-bg-light: #F9FAFB;          /* Mist White - main background */
  --color-bg-white: #FFFFFF;          /* Pure white */
  --color-bg-subtle: #F3F4F6;         /* Subtle gray */
  --color-bg-card: #FFFFFF;           /* Card backgrounds */
  --color-bg-elevated: #FFFFFF;       /* Elevated elements */
  --color-bg-deep: #F9FAFB;           /* Deprecated - for backward compatibility */

  --color-white: #ffffff;
  --color-white-90: rgba(255,255,255,0.90);
  --color-white-70: rgba(255,255,255,0.70);
  --color-white-50: rgba(255,255,255,0.50);
  --color-white-30: rgba(255,255,255,0.30);
  --color-white-20: rgba(255,255,255,0.20);
  --color-white-10: rgba(255,255,255,0.10);
  --color-white-05: rgba(255,255,255,0.05);

  --color-charcoal-text: #0D0D0F;
  --color-text-primary: #0D0D0F;          /* Dark text on light backgrounds */
  --color-text-secondary: rgba(13,13,15,0.65);  /* Secondary dark text */
  --color-text-muted: rgba(13,13,15,0.45);      /* Muted dark text */
  --color-text-on-gradient: #FFFFFF;            /* White text for gradient backgrounds */
  --color-text-on-gradient-secondary: rgba(255,255,255,0.90);
  --color-text-on-gradient-muted: rgba(255,255,255,0.75);

  /* === Key Gradients === */
  --gradient-spark: linear-gradient(135deg, #3DE0D4 0%, #C9A9FF 50%, #A057E8 100%);  /* bg-spark-gradient: teal → lilac → purple */
  --gradient-spark-hero: linear-gradient(180deg, #0B7A8F 0%, #1E8EA5 20%, #3BA5BC 35%, #5BBDD3 50%, #7BA8D8 65%, #9B93DD 80%, #B87FE0 100%);  /* Hero: deep teal → bright cyan → blue → purple */
  --gradient-teal: linear-gradient(135deg, #3DE0D4 0%, #2bc4ba 100%);
  --gradient-teal-purple: linear-gradient(135deg, #3DE0D4 0%, #A057E8 100%);
  --gradient-purple: linear-gradient(135deg, #A057E8 0%, #8844d6 100%);
  --gradient-lilac: linear-gradient(135deg, #C9A9FF 0%, #B77BF5 100%);
  --gradient-card-light: linear-gradient(145deg, rgba(255,255,255,0.98), rgba(249,250,251,0.95));  /* Light card gradient */
  --gradient-glow-teal: radial-gradient(ellipse at center, rgba(61,224,212,0.25) 0%, transparent 70%);
  --gradient-glow-purple: radial-gradient(ellipse at center, rgba(160,87,232,0.25) 0%, transparent 70%);
  --gradient-glow-lilac: radial-gradient(ellipse at center, rgba(201,169,255,0.20) 0%, transparent 70%);

  /* === Typography === */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  --text-8xl: 6rem;

  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;
  --weight-black: 900;

  --leading-tight: 1.08;
  --leading-snug: 1.25;
  --leading-normal: 1.6;
  --leading-relaxed: 1.72;
  --leading-loose: 1.95;

  /* === Spacing === */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 1.75rem;
  --space-8: 2rem;
  --space-9: 2.25rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-48: 12rem;

  /* === Borders === */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-2xl: 40px;
  --radius-full: 9999px;

  --border-subtle: 1px solid rgba(13,13,15,0.06);      /* Light theme subtle border */
  --border-card: 1px solid rgba(13,13,15,0.08);        /* Light theme card border */
  --border-teal: 1px solid rgba(61,224,212,0.40);
  --border-purple: 1px solid rgba(160,87,232,0.40);
  --border-lilac: 1px solid rgba(201,169,255,0.35);

  /* === Shadows - Light Theme === */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.02);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.03);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-xl: 0 8px 32px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.05);
  --shadow-teal: 0 2px 12px rgba(61,224,212,0.20), 0 1px 6px rgba(61,224,212,0.10);
  --shadow-teal-lg: 0 4px 24px rgba(61,224,212,0.25), 0 2px 12px rgba(61,224,212,0.15);
  --shadow-purple: 0 2px 12px rgba(160,87,232,0.20), 0 1px 6px rgba(160,87,232,0.10);
  --shadow-lilac: 0 2px 12px rgba(201,169,255,0.18), 0 1px 6px rgba(201,169,255,0.09);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);

  /* === Transitions === */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-smooth: 600ms cubic-bezier(0.16, 1, 0.3, 1);

  /* === Layout === */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --max-width-wide: 1400px;
  --nav-height: 64px;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-mist-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button {
  cursor: pointer;
  font-family: var(--font-body);
  border: none;
  outline: none;
}

input, select, textarea {
  font-family: var(--font-body);
  outline: none;
}

ul, ol {
  list-style: none;
}

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

.display-1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, var(--text-8xl));
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

.display-2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, var(--text-7xl));
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

.heading-1 {
  font-size: clamp(2rem, 5vw, var(--text-6xl));
  font-weight: var(--weight-bold);
  line-height: var(--leading-snug);
  letter-spacing: -0.02em;
}

.heading-2 {
  font-size: clamp(1.75rem, 4vw, var(--text-5xl));
  font-weight: var(--weight-bold);
  line-height: var(--leading-snug);
  letter-spacing: -0.01em;
}

.heading-3 {
  font-size: clamp(1.25rem, 3vw, var(--text-3xl));
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
}

.heading-4 {
  font-size: clamp(1.1rem, 2vw, var(--text-2xl));
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
}

.body-large {
  font-size: clamp(1rem, 1.5vw, var(--text-xl));
  line-height: var(--leading-relaxed);
  font-weight: var(--weight-regular);
}

.body-base {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

.body-small {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ============================================
   GRADIENT TEXT
   ============================================ */

.text-gradient-teal {
  background: var(--gradient-teal);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-purple {
  background: var(--gradient-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-teal-purple {
  background: var(--gradient-teal-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.01em;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

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

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

.btn-primary {
  background: var(--gradient-teal);
  color: var(--color-white);
  box-shadow: 0 2px 12px rgba(61,224,212,0.20), 0 1px 4px rgba(61,224,212,0.10);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(61,224,212,0.30), 0 2px 8px rgba(61,224,212,0.15);
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1.5px solid rgba(13,13,15,0.20);
}

.btn-secondary:hover {
  border-color: var(--color-teal-400);
  color: var(--color-teal-400);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(13,13,15,0.04);
  color: var(--color-text-primary);
  backdrop-filter: blur(10px);
  border: var(--border-subtle);
}

.btn-ghost:hover {
  background: rgba(13,13,15,0.08);
  transform: translateY(-2px);
}

.btn-purple {
  background: var(--gradient-purple);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(160,87,232,0.25);
}

.btn-purple:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(160,87,232,0.4);
}

.btn-lg {
  padding: 18px 40px;
  font-size: var(--text-lg);
}

.btn-sm {
  padding: 10px 20px;
  font-size: var(--text-sm);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--color-bg-card);
  border: var(--border-card);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13,13,15,0.12);
}

.card-glass {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-32) 0;
}

.section-lg {
  padding: var(--space-48) 0;
}

.section-sm {
  padding: var(--space-20) 0;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

/* ============================================
   BADGE / TAG
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge-teal {
  background: rgba(61,224,212,0.12);
  color: var(--color-spark-teal);
  border: 1px solid rgba(61,224,212,0.25);
}

.badge-purple {
  background: rgba(160,87,232,0.12);
  color: var(--color-orchid);
  border: 1px solid rgba(160,87,232,0.25);
}

.badge-lilac {
  background: rgba(201,169,255,0.10);
  color: var(--color-soft-lilac);
  border: 1px solid rgba(201,169,255,0.22);
}

.badge-white {
  background: rgba(13,13,15,0.06);
  color: var(--color-text-secondary);
  border: var(--border-subtle);
}

/* ============================================
   DIVIDER
   ============================================ */

.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(13,13,15,0.10), transparent);
  border: none;
  margin: 0;
}

/* ============================================
   GLOW ORBS (Abstract decorative)
   ============================================ */

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.glow-orb-teal {
  background: radial-gradient(circle, rgba(31,186,178,0.3) 0%, transparent 70%);
}

.glow-orb-purple {
  background: radial-gradient(circle, rgba(148,112,232,0.25) 0%, transparent 70%);
}

/* ============================================
   SECTION EYEBROW
   ============================================ */

.eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-teal-400);
  margin-bottom: var(--space-4);
}

.eyebrow-purple {
  color: var(--color-purple-400);
}

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

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeLeft {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(31,186,178,0.2); }
  50% { box-shadow: 0 0 40px rgba(31,186,178,0.4); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Animate on scroll */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-delay-1 { transition-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; }
.animate-delay-4 { transition-delay: 0.4s; }
.animate-delay-5 { transition-delay: 0.5s; }

/* ============================================
   FORMS
   ============================================ */

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

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  letter-spacing: 0.01em;
}

.form-input {
  width: 100%;
  padding: 14px 18px;
  background: #FFFFFF;
  border: 1.5px solid rgba(13,13,15,0.15);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder {
  color: rgba(13,13,15,0.35);
}

.form-input:focus {
  border-color: var(--color-spark-teal);
  background: rgba(61,224,212,0.04);
  box-shadow: 0 0 0 3px rgba(61,224,212,0.12);
}

.form-input.error {
  border-color: #ff6b6b;
}

select.form-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234dccc6' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
  cursor: pointer;
}

select.form-input option {
  background: #FFFFFF;
  color: var(--color-text-primary);
}

/* ============================================
   PILLAR ICONS
   ============================================ */

.pillar-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.pillar-icon-teal {
  background: rgba(31,186,178,0.15);
  border: 1px solid rgba(31,186,178,0.25);
}

.pillar-icon-purple {
  background: rgba(148,112,232,0.15);
  border: 1px solid rgba(148,112,232,0.25);
}

.pillar-icon-mixed {
  background: linear-gradient(135deg, rgba(31,186,178,0.15), rgba(148,112,232,0.15));
  border: 1px solid rgba(148,112,232,0.2);
}

/* ============================================
   SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(61,224,212,0.3);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(61,224,212,0.5);
}

/* ============================================
   SELECTION
   ============================================ */

::selection {
  background: rgba(61,224,212,0.30);
  color: var(--color-charcoal);
}

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

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .container,
  .container-narrow,
  .container-wide {
    padding: 0 var(--space-5);
  }

  .section {
    padding: var(--space-20) 0;
  }

  .section-lg {
    padding: var(--space-32) 0;
  }

  .btn-lg {
    padding: 16px 32px;
    font-size: var(--text-base);
  }
}

@media (max-width: 480px) {
  .container,
  .container-narrow,
  .container-wide {
    padding: 0 var(--space-4);
  }
}