/**
 * BRIDE BUDDY - Sunset Glow UI System
 * Design Language: Sunset gradients with glowing frosted glass
 * Aesthetic: LED-lit luxury with warm champagne highlights
 */

/* ================================================================
   CSS CUSTOM PROPERTIES - Design Tokens
   ================================================================ */

:root {
  /* ===== COLOR PALETTE ===== */

  --color-background-top: #1a0b2e;
  --color-background-middle: #4a1942;
  --color-background-bottom: #8b4513;

  --color-heading: #fff9e6;
  --color-body: #f5e6d3;
  --color-body-muted: rgba(245, 230, 211, 0.75);
  --color-accent: #c9a961;
  --color-accent-dark: #b8933d;
  --color-accent-soft: rgba(201, 169, 97, 0.4);
  --color-warm: #8b4513;
  --color-white: #ffffff;

  --color-surface: rgba(255, 235, 205, 0.15);
  --color-surface-strong: rgba(255, 235, 205, 0.25);
  --color-surface-subtle: rgba(255, 235, 205, 0.08);
  --color-border: rgba(201, 169, 97, 0.3);
  --color-border-strong: rgba(201, 169, 97, 0.45);

  --gradient-sunset: linear-gradient(
    180deg,
    var(--color-background-top) 0%,
    var(--color-background-middle) 50%,
    var(--color-background-bottom) 100%
  );
  --gradient-gold: linear-gradient(135deg, #c9a961 0%, #b8933d 100%);
  --gradient-gold-bright: linear-gradient(135deg, #f6e7b2 0%, #c9a961 100%);

  /* Compatibility tokens for legacy utility usage */
  --color-navy: #1a0b2e;
  --color-burgundy: var(--color-body);
  --color-rust: var(--color-warm);
  --color-gold: var(--color-accent);
  --color-gold-hover: var(--color-accent-dark);
  --color-cream: rgba(255, 235, 205, 0.35);

  /* Alpha Variations */
  --color-navy-10: rgba(26, 11, 46, 0.1);
  --color-navy-20: rgba(26, 11, 46, 0.2);
  --color-navy-80: rgba(26, 11, 46, 0.8);
  --color-navy-95: rgba(26, 11, 46, 0.95);

  --color-burgundy-10: rgba(245, 230, 211, 0.1);
  --color-burgundy-20: rgba(245, 230, 211, 0.2);

  --color-gold-10: rgba(201, 169, 97, 0.1);
  --color-gold-20: rgba(201, 169, 97, 0.2);
  --color-gold-30: rgba(201, 169, 97, 0.3);
  --color-gold-40: rgba(201, 169, 97, 0.4);

  --color-cream-50: rgba(255, 235, 205, 0.5);
  --color-cream-80: rgba(255, 235, 205, 0.8);
  --color-cream-90: rgba(255, 235, 205, 0.9);
  --color-cream-98: rgba(255, 235, 205, 0.98);

  --color-rust-10: rgba(139, 69, 19, 0.1);
  --color-rust-20: rgba(139, 69, 19, 0.2);

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

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace;

  --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;

  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* ===== SPACING ===== */

  --space-0: 0;
  --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;

  /* ===== BORDERS & RADII ===== */

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --border-width: 1px;
  --border-width-2: 2px;
  --border-width-4: 4px;

  /* ===== SHADOWS ===== */

  --shadow-sm: 0 2px 8px rgba(10, 4, 20, 0.25);
  --shadow-md: 0 4px 20px rgba(10, 4, 20, 0.35);
  --shadow-lg: 0 0 40px rgba(201, 169, 97, 0.35);
  --shadow-xl: 0 0 60px rgba(201, 169, 97, 0.45);
  --shadow-2xl: 0 0 80px rgba(201, 169, 97, 0.6);

  --glow-gold: 0 0 40px rgba(201, 169, 97, 0.4);
  --glow-gold-strong: 0 0 60px rgba(201, 169, 97, 0.6);

  /* ===== TRANSITIONS ===== */

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* ===== Z-INDEX LAYERS ===== */

  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-popover: 1500;
  --z-toast: 1600;

  /* ===== BREAKPOINTS ===== */

  --screen-sm: 480px;
  --screen-md: 768px;
  --screen-lg: 1024px;
  --screen-xl: 1440px;

  /* ===== FROSTED GLASS EFFECT ===== */

  --glass-bg: var(--color-surface);
  --glass-backdrop-filter: blur(20px) saturate(170%);
  --glass-border: 1px solid var(--color-border);
}

/* ================================================================
   CSS RESET & BASE STYLES
   ================================================================ */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-body);
  background: var(--gradient-sunset);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-heading);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: var(--text-4xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-3xl);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

h5 {
  font-size: var(--text-lg);
}

h6 {
  font-size: var(--text-base);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-body);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-dark);
}

.logo,
.logo-led {
  color: var(--color-accent);
  text-shadow: 0 0 30px rgba(201, 169, 97, 0.6);
}

a:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong, b {
  font-weight: var(--font-bold);
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--text-sm);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.125rem 0.25rem;
  background-color: var(--color-surface-strong);
  border-radius: var(--radius-sm);
  color: var(--color-background-top);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: var(--space-4);
  background-color: var(--color-surface-strong);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

/* ================================================================
   BACKGROUND WRAPPERS
   ================================================================ */

.bg-sunset {
  position: relative;
  min-height: 100vh;
  background: var(--gradient-sunset);
  color: var(--color-body);
}

.bg-sunset::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
      circle at 20% 20%,
      rgba(255, 235, 205, 0.12) 0%,
      transparent 55%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(201, 169, 97, 0.18) 0%,
      transparent 60%
    );
  pointer-events: none;
}

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

.container {
  width: 100%;
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.flex-1 {
  flex: 1 1 0%;
}

.flex-wrap {
  flex-wrap: wrap;
}

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* Spacing Utilities */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.ml-4 { margin-left: var(--space-4); }
.mr-4 { margin-right: var(--space-4); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.px-4 {
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.py-4 {
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

/* Text Utilities */
.text-center {
  text-align: center;
}

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

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

.text-navy {
  color: var(--color-navy);
}

.text-burgundy {
  color: var(--color-burgundy);
}

.text-gold {
  color: var(--color-gold);
}

.text-white {
  color: var(--color-white);
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: var(--glow-gold);
  }
  50% {
    box-shadow: var(--glow-gold-strong);
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn var(--transition-slow) ease-out;
}

.animate-fade-in-scale {
  animation: fadeInScale var(--transition-slow) ease-out;
}

.animate-slide-in-right {
  animation: slideInRight var(--transition-base) ease-out;
}

.animate-slide-in-left {
  animation: slideInLeft var(--transition-base) ease-out;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-glow {
  animation: glow 3s ease-in-out infinite;
}

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

.hidden {
  display: none !important;
}

/* Mobile-specific */
@media (max-width: 767px) {
  .hidden-mobile {
    display: none !important;
  }
}

/* Tablet and up */
@media (min-width: 768px) {
  .hidden-tablet {
    display: none !important;
  }
}

/* Desktop and up */
@media (min-width: 1024px) {
  .hidden-desktop {
    display: none !important;
  }
}

/* ================================================================
   ACCESSIBILITY
   ================================================================ */

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

/* Screen reader only */
.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 to main content link */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-gold);
  color: var(--color-navy);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  z-index: var(--z-toast);
  transition: top var(--transition-fast);
}

.skip-to-main:focus {
  top: var(--space-4);
}

/* Reduced motion preference */
@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;
  }
}

/* ================================================================
   PRINT STYLES
   ================================================================ */

@media print {
  .no-print {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  a {
    text-decoration: underline;
  }
}