@tailwind base;
@tailwind components;
@tailwind utilities;

:root {
  /* === 水墨雅致 · 色彩体系 === */
  --color-primary: #1A1A1A;
  --color-primary-hover: #0D0D0D;
  --color-primary-light: #3D3D3D;
  --color-primary-lighter: #F5F4F0;
  --color-primary-rgb: 26, 26, 26;

  /* 朱砂点睛：品牌红仅作点缀 */
  --color-brand-primary: #C41E3A;
  --color-brand-primary-hover: #A01830;
  --color-brand-primary-light: #E04A68;
  --color-brand-primary-bg: #FEF2F4;

  /* 宣纸暖白 + 水墨灰梯度 */
  --color-bg-primary: #FAFAF7;
  --color-bg-secondary: #F5F4F0;
  --color-bg-tertiary: #E8E6E0;
  --color-bg-section: #F2F1EC;
  --color-bg-hover: #EDECE7;

  /* 墨色文字梯度 */
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #3A3835;
  --color-text-tertiary: #4A4742;
  --color-text-muted: #6B6560;
  --color-text-subtle: #9C978F;
  --color-text-placeholder: #7A756D;
  --color-text-hint: #A09A92;

  /* 水墨边框 */
  --color-border-primary: #E0DDD6;
  --color-border-secondary: #D4D0C8;
  --color-border-accent: #1A1A1A;
  --color-border-light: #EDEBE5;
  --color-border-dark: #3A3835;

  --color-link: #1A1A1A;
  --color-link-hover: #C41E3A;

  --color-success: #16A34A;
  --color-success-hover: #15803D;
  --color-success-bg: #F0FDF4;
  --color-warning: #D97706;
  --color-warning-hover: #B45309;
  --color-warning-bg: #FFFBEB;
  --color-info: #5C5C5C;
  --color-info-bg: #F5F5F5;
  --color-error: #C41E3A;
  --color-error-bg: #FEF2F4;

  --color-accent-blue: #3B6B9E;
  --color-accent-purple: #6B4C8A;
  --color-accent-cyan: #2D7A8A;

  --color-brand-primary-rgb: 196, 30, 58;
  --color-warning-rgb: 217, 119, 6;
  --color-success-rgb: 22, 163, 74;
  --color-accent-blue-rgb: 59, 107, 158;
  --color-accent-purple-rgb: 107, 76, 138;
  --color-accent-cyan-rgb: 45, 122, 138;

  /* 深墨色底部区域 */
  --color-footer-bg: #1A1816;
  --color-cta-bg: #1A1816;
  --color-hero-dark-end: #1A1816;
  --color-footer-text: #B5AFA5;
  --color-footer-text-muted: #8A8478;
  --color-footer-text-dim: #9E988C;
  --color-footer-text-link: #D4CFC5;
  --color-footer-border: #3A3630;

  --color-challenge-isolation: #FEF2F4;
  --color-challenge-isolation-hover: #FDE8EC;
  --color-challenge-growth: #FFFBEB;
  --color-challenge-growth-hover: #FEF3C7;
  --color-challenge-compliance: #F0FDF4;
  --color-challenge-compliance-hover: #DCFCE7;

  --color-flip-card-bg: #F5F4F0;
  --color-flip-card-border: #E0DDD6;
  --color-flip-card-divider: #A09A92;
  --color-flip-card-divider-subtle: #D4D0C8;

  /* 宣纸纹理色彩 */
  --color-ink-wash-light: rgba(26, 26, 26, 0.04);
  --color-ink-wash-medium: rgba(26, 26, 26, 0.08);
  --color-ink-wash-dark: rgba(26, 26, 26, 0.15);

  --color-toast-success-bg: #F0FDF4;
  --color-toast-success-border: #BBF7D0;
  --color-toast-error-bg: #FEF2F4;
  --color-toast-error-border: #FECACA;
  --color-toast-info-bg: #EFF6FF;
  --color-toast-info-border: #BFDBFE;
  --color-toast-close: #A3A3A3;
  --color-toast-close-hover: #595959;

  --color-skeleton-bg: #E5E5E5;

  /* 水墨雅致阴影 - 更柔和 */
  --shadow-sm: 0 1px 3px rgba(26, 24, 22, 0.04);
  --shadow-md: 0 4px 8px rgba(26, 24, 22, 0.05);
  --shadow-lg: 0 10px 20px rgba(26, 24, 22, 0.06);
  --shadow-xl: 0 20px 40px rgba(26, 24, 22, 0.08);

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  --line-height-tight: 1.15;
  --line-height-snug: 1.35;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;

  --border-width-thin: 0.5px;
  --border-width-normal: 1px;

  --transition-fast: 200ms;
  --transition-normal: 300ms;
  --transition-slow: 500ms;

  --ease-out: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

[data-theme="dark"] {
  /* === 水墨雅致 · 暗色模式 === */
  --color-primary: #E0DCD4;
  --color-primary-hover: #EDEAE2;
  --color-primary-light: #A09A92;
  --color-primary-lighter: #2A2722;
  --color-primary-rgb: 224, 220, 212;

  --color-brand-primary: #D43650;
  --color-brand-primary-hover: #E04A68;
  --color-brand-primary-light: #C41E3A;
  --color-brand-primary-bg: rgba(196, 30, 58, 0.15);

  --color-bg-primary: #0E0D0B;
  --color-bg-secondary: #151412;
  --color-bg-tertiary: #1E1C18;
  --color-bg-section: #181614;
  --color-bg-hover: #2A2722;

  --color-text-primary: #E0DCD4;
  --color-text-secondary: #B5AFA5;
  --color-text-tertiary: #9E988C;
  --color-text-muted: #8A8478;
  --color-text-subtle: #6B6560;
  --color-text-placeholder: #6B6560;
  --color-text-hint: #5A554D;

  --color-border-primary: #2A2722;
  --color-border-secondary: #3A3630;
  --color-border-accent: #E0DCD4;
  --color-border-light: #1E1C18;
  --color-border-dark: #B5AFA5;

  --color-link: #E0DCD4;
  --color-link-hover: #E04A68;

  --color-success: #22C55E;
  --color-success-hover: #16A34A;
  --color-success-bg: rgba(22, 163, 74, 0.15);
  --color-warning: #F59E0B;
  --color-warning-hover: #D97706;
  --color-warning-bg: rgba(217, 119, 6, 0.15);
  --color-info: #8C8C8C;
  --color-info-bg: #1A1A1A;
  --color-error: #D43650;
  --color-error-bg: rgba(196, 30, 58, 0.15);

  --color-accent-blue: #5A8BB8;
  --color-accent-purple: #8B6BAE;
  --color-accent-cyan: #4A9AAA;

  --color-brand-primary-rgb: 212, 54, 80;
  --color-warning-rgb: 245, 158, 11;
  --color-success-rgb: 34, 197, 94;
  --color-accent-blue-rgb: 90, 139, 184;
  --color-accent-purple-rgb: 139, 107, 174;
  --color-accent-cyan-rgb: 74, 154, 170;

  --color-footer-bg: #0A0908;
  --color-cta-bg: #141210;
  --color-hero-dark-end: #141210;
  --color-footer-text: #9E988C;
  --color-footer-text-muted: #6B6560;
  --color-footer-text-dim: #8A8478;
  --color-footer-text-link: #B5AFA5;
  --color-footer-border: #2A2722;

  --color-challenge-isolation: rgba(196, 30, 58, 0.12);
  --color-challenge-isolation-hover: rgba(196, 30, 58, 0.2);
  --color-challenge-growth: rgba(217, 119, 6, 0.12);
  --color-challenge-growth-hover: rgba(217, 119, 6, 0.2);
  --color-challenge-compliance: rgba(22, 163, 74, 0.12);
  --color-challenge-compliance-hover: rgba(22, 163, 74, 0.2);

  --color-flip-card-bg: #1E1C18;
  --color-flip-card-border: #2A2722;
  --color-flip-card-divider: #5A554D;
  --color-flip-card-divider-subtle: #3A3630;

  --color-toast-success-bg: rgba(22, 163, 74, 0.15);
  --color-toast-success-border: rgba(34, 197, 94, 0.3);
  --color-toast-error-bg: rgba(196, 30, 58, 0.15);
  --color-toast-error-border: rgba(224, 74, 104, 0.3);
  --color-toast-info-bg: rgba(59, 130, 246, 0.15);
  --color-toast-info-border: rgba(59, 130, 246, 0.3);
  --color-toast-close: #666666;
  --color-toast-close-hover: #A3A3A3;

  --color-skeleton-bg: #2A2722;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.25);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);
}

@layer base {
  * {
    @apply antialiased;
    border-color: var(--color-border-primary);
  }

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

  @media (min-width: 640px) {
    html {
      font-size: 17px;
    }
  }

  @media (min-width: 1024px) {
    html {
      font-size: 18px;
    }
  }

  body {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    line-height: var(--line-height-normal);
    letter-spacing: var(--letter-spacing-normal);
    position: relative;
    overflow-x: hidden;
    width: 100%;
  }

  body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
      radial-gradient(ellipse at 20% 15%, rgba(var(--color-primary-rgb), 0.015) 0%, transparent 50%),
      radial-gradient(ellipse at 80% 85%, rgba(var(--color-brand-primary-rgb), 0.015) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
  }

  h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--color-text-primary);
  }

  h1 { font-size: var(--font-size-5xl); }
  h2 { font-size: var(--font-size-4xl); }
  h3 { font-size: var(--font-size-2xl); }
  h4 { font-size: var(--font-size-xl); }

  p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
  }

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

  a:hover {
    color: var(--color-link-hover);
  }

  button {
    font-family: inherit;
    cursor: pointer;
  }

  input, textarea {
    font-family: inherit;
    outline: none;
  }

  input:focus, textarea:focus {
    outline: none;
  }

  .font-calligraphy {
    font-family: var(--font-ma-shan-zheng), 'Ma Shan Zheng', 'ZCOOL XiaoWei', 'STKaiti', 'KaiTi', serif !important;
    font-weight: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
  }

  .font-brand {
    font-family: var(--font-aoyagi-reisho), 'Aoyagi Reisho', 'Ma Shan Zheng', 'ZCOOL XiaoWei', 'STKaiti', 'KaiTi', serif !important;
    font-weight: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
  }

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

@layer utilities {
  .container-wide {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }

  @media (min-width: 768px) {
    .container-wide {
      padding-left: var(--spacing-2xl);
      padding-right: var(--spacing-2xl);
    }
  }

  @media (min-width: 1024px) {
    .container-wide {
      padding-left: 4rem;
      padding-right: 4rem;
    }
  }

  .container-full {
    width: 100%;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }

  @media (min-width: 768px) {
    .container-full {
      padding-left: var(--spacing-2xl);
      padding-right: var(--spacing-2xl);
    }
  }

  @media (min-width: 1024px) {
    .container-full {
      padding-left: 4rem;
      padding-right: 4rem;
    }
  }

  .section-padding {
    padding-top: var(--spacing-5xl);
    padding-bottom: var(--spacing-5xl);
  }

  @media (min-width: 1024px) {
    .section-padding {
      padding-top: 10rem;
      padding-bottom: 10rem;
    }
  }

  /* ===== 背景纹理系统 ===== */
  .bg-texture-grid {
    background-image:
      linear-gradient(rgba(var(--color-border-primary-rgb, 229, 229, 229), 0.3) 1px, transparent 1px),
      linear-gradient(90deg, rgba(var(--color-border-primary-rgb, 229, 229, 229), 0.3) 1px, transparent 1px);
    background-size: 60px 60px;
  }

  .bg-texture-dots {
    background-image: radial-gradient(circle, rgba(var(--color-border-primary-rgb, 229, 229, 229), 0.4) 1px, transparent 1px);
    background-size: 24px 24px;
  }

  .bg-texture-noise {
    position: relative;
  }
  .bg-texture-noise::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 128px 128px;
    pointer-events: none;
    z-index: 0;
  }

  .bg-gradient-radial-brand {
    background:
      radial-gradient(ellipse at 30% 20%, rgba(var(--color-brand-primary-rgb), 0.04) 0%, transparent 50%),
      radial-gradient(ellipse at 70% 80%, rgba(var(--color-primary-rgb), 0.02) 0%, transparent 50%);
  }

  .bg-gradient-subtle-warm {
    background:
      radial-gradient(ellipse at 50% 0%, rgba(var(--color-brand-primary-rgb), 0.03) 0%, transparent 60%);
  }

  /* ===== 水墨雅致 · 宣纸纹理 ===== */
  .bg-paper-texture {
    position: relative;
  }
  .bg-paper-texture::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='paper'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='5' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23paper)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 200px 200px;
    pointer-events: none;
    z-index: 0;
  }

  /* 水墨渐淡分隔线 */
  .ink-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-primary), transparent);
  }

  /* 水墨淡染背景块 */
  .ink-wash-block {
    background: radial-gradient(ellipse at 50% 50%, var(--color-ink-wash-light) 0%, transparent 70%);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes stampIn {
  0% {
    opacity: 0;
    transform: scale(1.5) rotate(-15deg);
  }
  50% {
    opacity: 0.8;
    transform: scale(0.95) rotate(0deg);
  }
  70% {
    transform: scale(1.02) rotate(0deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s var(--ease-out) forwards;
}

.animate-stamp-in {
  animation: stampIn 0.6s var(--ease-out) forwards;
}

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-accent);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

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

  html {
    scroll-behavior: auto;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }

  .section-padding {
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
  }
}

.safe-area-inset-bottom {
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

body {
  padding-bottom: 0;
  text-wrap: pretty;
}

@media (max-width: 767px) {
  body {
    padding-bottom: 64px;
  }

  .container-wide,
  .container-full {
    padding-left: 1rem;
    padding-right: 1rem;
    max-width: 100%;
    overflow-x: hidden;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.375rem; }

  a:not(nav[aria-label="breadcrumb"] a), button {
    min-height: 44px;
    min-width: 44px;
  }
  nav[aria-label="breadcrumb"] a {
    min-height: 0;
    min-width: 0;
  }

  p, li, span {
    overflow-wrap: break-word;
    word-wrap: break-word;
  }
}

@property --border-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@keyframes rotateBorder {
  from { --border-angle: 0deg; }
  to { --border-angle: 360deg; }
}

.ink-glow-border {
  animation: rotateBorder 6s linear infinite paused;
}

.ink-glow-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(from var(--border-angle),
    var(--glow-start, var(--color-text-muted)),
    var(--glow-end, var(--color-border-primary)),
    var(--glow-start, var(--color-text-muted)));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}

.ink-glow-border:hover::before {
  opacity: 0.8;
}

.ink-glow-border::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: inherit;
  background: conic-gradient(from var(--border-angle),
    var(--glow-start, var(--color-text-muted)),
    var(--glow-end, var(--color-border-primary)),
    var(--glow-start, var(--color-text-muted)));
  filter: blur(16px);
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
  z-index: -1;
}

.ink-glow-border:hover::after {
  opacity: 0.2;
}

.ink-glow-border:hover {
  animation-play-state: running;
}

@media (min-width: 768px) and (max-width: 1023px) {
  .container-wide,
  .container-full {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }

  .section-padding {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }
}

.page-transition-loader {
  width: 120px;
  height: 3px;
  background: var(--color-bg-section);
  border-radius: 2px;
  overflow: hidden;
}

.page-transition-loader__bar {
  width: 40%;
  height: 100%;
  background: var(--color-brand-primary);
  border-radius: 2px;
  animation: page-loader-slide 1.2s ease-in-out infinite;
}

@keyframes page-loader-slide {
  0% {
    transform: translateX(-100%);
  }
  50% {
    transform: translateX(200%);
  }
  100% {
    transform: translateX(-100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-transition-loader__bar {
    animation: none;
    width: 100%;
  }
}

@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 0.5;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

.animate-ripple {
  animation: ripple 0.6s ease-out forwards;
}

@keyframes skeletonPulse {
  0%, 100% {
    background-color: var(--color-skeleton-bg);
    opacity: 1;
  }
  50% {
    background-color: color-mix(in srgb, var(--color-brand-primary) 8%, var(--color-skeleton-bg));
    opacity: 0.8;
  }
}

.skeleton-brand {
  animation: skeletonPulse 2s ease-in-out infinite;
}

/* ===== 背景纹理系统 - Dark Mode ===== */
[data-theme="dark"] .bg-texture-grid {
  background-image:
    linear-gradient(rgba(var(--color-border-primary-rgb, 42, 39, 34), 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--color-border-primary-rgb, 42, 39, 34), 0.5) 1px, transparent 1px);
}

[data-theme="dark"] .bg-texture-dots {
  background-image: radial-gradient(circle, rgba(var(--color-border-primary-rgb, 42, 39, 34), 0.5) 1px, transparent 1px);
}

[data-theme="dark"] .bg-paper-texture::before {
  opacity: 0.04;
}

[data-theme="dark"] .bg-texture-noise::before {
  opacity: 0.05;
}

[data-theme="dark"] .bg-gradient-radial-brand {
  background:
    radial-gradient(ellipse at 30% 20%, rgba(var(--color-brand-primary-rgb), 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(var(--color-primary-rgb), 0.03) 0%, transparent 50%);
}

[data-theme="dark"] .bg-gradient-subtle-warm {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(var(--color-brand-primary-rgb), 0.05) 0%, transparent 60%);
}

[data-theme="dark"] .ink-divider {
  background: linear-gradient(90deg, transparent, var(--color-border-secondary), transparent);
}

[data-theme="dark"] .ink-wash-block {
  background: radial-gradient(ellipse at 50% 50%, rgba(var(--color-primary-rgb), 0.03) 0%, transparent 70%);
}