@import "tailwindcss";

@custom-variant dark (&:where(.dark, .dark *));

@theme inline {
  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --font-sans: "Geist Variable", system-ui, sans-serif;
  --font-mono: "Geist Mono Variable", ui-monospace, monospace;
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;
  --animate-scroll: scroll 30s linear infinite;
  --animate-scroll-reverse: scroll 30s linear infinite reverse;
  --animate-fade-in: fadeIn 0.6s ease-out;
  --animate-float: float 6s ease-in-out infinite;
}

:root,
.light {
  --background: #ffffff;
  --foreground: #0f172a;
  --card: #ffffff;
  --card-foreground: #0f172a;
  --muted: #f1f5f9;
  --muted-foreground: #64748b;
  --border: #e2e8f0;
  --accent: #f59e0b;
  --accent-foreground: #1c1917;
  --accent-muted: rgba(245, 158, 11, 0.2);
  --gradient-accent: rgba(251, 191, 36, 0.15);
}

.dark {
  --background: #0f172a;
  --foreground: #f8fafc;
  --card: rgba(255, 255, 255, 0.05);
  --card-foreground: #f8fafc;
  --muted: rgba(255, 255, 255, 0.05);
  --muted-foreground: #94a3b8;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #f59e0b;
  --accent-foreground: #1c1917;
  --accent-muted: rgba(245, 158, 11, 0.2);
  --gradient-accent: rgba(251, 191, 36, 0.15);
}

@keyframes scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

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

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

/* 课程页 - 渐变背景动画 */
@keyframes gradient-shift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

.animate-gradient {
  animation: gradient-shift 8s ease-in-out infinite;
}

/* 卡片悬停光效 */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.hover-shimmer {
  position: relative;
  overflow: hidden;
}

.hover-shimmer::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.05),
    transparent
  );
  background-size: 200% 100%;
  opacity: 0;
  transition: opacity 0.3s;
}

.hover-shimmer:hover::after {
  opacity: 1;
  animation: shimmer 1.5s ease-in-out;
}

/* CTA 徽章轻微浮动 */
@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-2px); }
}

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

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans), system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

.marquee-container {
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.gradient-text {
  background: linear-gradient(135deg, #0ea5e9, #06b6d4, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-hover {
  transition: all 0.3s ease;
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}
.dark .card-hover:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.resource-card {
  transition: all 0.2s ease;
}
.resource-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* ===== Prose / Markdown Rendering ===== */
.prose-custom {
  font-size: 1rem;
  line-height: 1.85;
  color: #334155;
}
.dark .prose-custom {
  color: #94a3b8;
}

.prose-custom h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #0f172a;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.dark .prose-custom h1 {
  color: #f8fafc;
}

.prose-custom h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #0f172a;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #e2e8f0;
}
.dark .prose-custom h2 {
  color: #f8fafc;
  border-bottom-color: #334155;
}

.prose-custom h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1e293b;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.prose-custom h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1e293b;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.prose-custom p {
  margin-bottom: 1.25rem;
}

.prose-custom a {
  color: #0ea5e9;
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: #bae6fd;
  text-underline-offset: 2px;
  transition: text-decoration-color 0.2s;
}
.prose-custom a:hover {
  text-decoration-color: #0ea5e9;
}

.prose-custom strong {
  font-weight: 700;
  color: #0f172a;
}

.prose-custom em {
  color: #475569;
}

.prose-custom ul {
  list-style-type: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.prose-custom ol {
  list-style-type: decimal;
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.prose-custom li {
  margin-bottom: 0.4rem;
}

.prose-custom li > ul,
.prose-custom li > ol {
  margin-top: 0.4rem;
  margin-bottom: 0;
}

.prose-custom blockquote {
  border-left: 4px solid #0ea5e9;
  background: #f0f9ff;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 0.75rem 0.75rem 0;
  color: #334155;
}
.dark .prose-custom blockquote {
  background: #0c4a6e33;
  border-left-color: #38bdf8;
  color: #94a3b8;
}

.prose-custom blockquote p:last-child {
  margin-bottom: 0;
}

.prose-custom hr {
  border: none;
  border-top: 1px solid #e2e8f0;
  margin: 2rem 0;
}

.prose-custom code {
  background: #f1f5f9;
  color: #0f172a;
  padding: 0.15rem 0.4rem;
  border-radius: 0.375rem;
  font-size: 0.875em;
  font-family: var(--font-mono), ui-monospace, monospace;
}
.dark .prose-custom code {
  background: #334155;
  color: #e2e8f0;
}

.prose-custom pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: 0.75rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.7;
}

.prose-custom pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

.prose-custom table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  overflow: hidden;
  border-radius: 0.75rem;
  border: 1px solid #e2e8f0;
}

.prose-custom thead {
  background: #f8fafc;
}

.prose-custom th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: #0f172a;
  border-bottom: 2px solid #e2e8f0;
  white-space: nowrap;
}

.prose-custom td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid #f1f5f9;
  color: #475569;
}

.prose-custom tbody tr:last-child td {
  border-bottom: none;
}

.prose-custom tbody tr:hover {
  background: #f8fafc;
}

.prose-custom img {
  max-width: 100%;
  border-radius: 0.75rem;
  margin: 1.5rem 0;
}

/* Checkbox list styling */
.prose-custom input[type="checkbox"] {
  margin-right: 0.5rem;
  accent-color: #0ea5e9;
}

.prose-custom li:has(input[type="checkbox"]) {
  list-style-type: none;
  margin-left: -1.5rem;
}

/* Mobile adjustments */
@media (max-width: 640px) {
  .prose-custom h1 {
    font-size: 1.75rem;
  }
  .prose-custom h2 {
    font-size: 1.3rem;
  }
  .prose-custom h3 {
    font-size: 1.1rem;
  }
  .prose-custom table {
    font-size: 0.8rem;
    display: block;
    overflow-x: auto;
  }
  .prose-custom th,
  .prose-custom td {
    padding: 0.5rem 0.65rem;
  }
  .prose-custom blockquote {
    padding: 0.75rem 1rem;
  }
}

/* ===== Form Inputs ===== */
.form-input {
  width: 100%;
  border: 0;
  background: transparent;
  font-size: 15px;
  line-height: 1.5;
  color: #1e293b;
  outline: none;
  padding: 0;
}

.form-input::placeholder {
  color: #b2b2b2;
}

@media (min-width: 640px) {
  .form-input {
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
    padding: 0.65rem 0.875rem;
    font-size: 15px;
    background: #f8fafc;
    transition: border-color 0.2s, box-shadow 0.2s;
  }
  .form-input:focus {
    border-color: #0ea5e9;
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
    background: #fff;
  }
  textarea.form-input {
    padding: 0.75rem 0.875rem;
  }
  select.form-input {
    padding-right: 2.25rem;
    cursor: pointer;
  }
}