/* 我的学习日常 - 全站样式 */

:root {
  --bg: #f7f3ef;
  --bg-elevated: #ffffff;
  --bg-deep: #f0e4d7;
  --primary: #e07a5f;
  --primary-soft: rgba(224, 122, 95, 0.12);
  --accent: #3d405b;
  --text: #2f3437;
  --text-soft: #6b6f72;
  --border-soft: rgba(0, 0, 0, 0.06);
  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.12);
  --shadow-card: 0 12px 30px rgba(15, 23, 42, 0.08);
  --transition-fast: 0.18s ease-out;
  --transition-med: 0.28s ease;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-elevated: #020617;
  --bg-deep: #020617;
  --primary: #f97360;
  --primary-soft: rgba(249, 115, 96, 0.15);
  --accent: #e5e7eb;
  --text: #e5e7eb;
  --text-soft: #9ca3af;
  --border-soft: rgba(148, 163, 184, 0.35);
  --shadow-soft: 0 22px 60px rgba(0, 0, 0, 0.8);
  --shadow-card: 0 20px 55px rgba(15, 23, 42, 0.9);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro SC",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top left, #fef3c7, transparent 40%),
    radial-gradient(circle at bottom right, #e0f2fe, transparent 45%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
}

img {
  max-width: 100%;
  display: block;
}

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

main a {
  transition: color var(--transition-fast), transform var(--transition-fast);
}

main a:hover {
  color: var(--primary);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(22px);
  background: linear-gradient(
      to bottom,
      rgba(248, 250, 252, 0.9),
      rgba(248, 250, 252, 0.75),
      transparent
    );
}

[data-theme="dark"] .site-header {
  background: linear-gradient(
      to bottom,
      rgba(15, 23, 42, 0.92),
      rgba(15, 23, 42, 0.8),
      transparent
    );
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 20px 10px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 14px;
  background: conic-gradient(
    from 180deg,
    #f97360,
    #facc15,
    #34d399,
    #60a5fa,
    #f97360
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 700;
  box-shadow: 0 12px 25px rgba(248, 113, 113, 0.45);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 16px;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-soft);
}

.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
}

.nav a {
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--text-soft);
}

.nav a.active,
.nav a:hover {
  color: var(--accent);
  background: rgba(148, 163, 184, 0.12);
}

.theme-toggle {
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  padding: 4px 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  font-size: 12px;
  color: var(--text-soft);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.15);
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast), background var(--transition-fast);
}

[data-theme="dark"] .theme-toggle {
  background: rgba(15, 23, 42, 0.9);
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.2);
}

.theme-toggle span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle-icon {
  width: 20px;
  height: 20px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 25%, #fef3c7, #f97360);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #111827;
}

[data-theme="dark"] .theme-toggle-icon {
  background: radial-gradient(circle at 30% 25%, #38bdf8, #0f172a);
  color: #e5e7eb;
}

.layout {
  max-width: 1120px;
  margin: 0 auto;
  padding: 10px 20px 40px;
}

.hero {
  margin-top: 18px;
  padding: 22px 22px 20px;
  border-radius: 28px;
  background:
    radial-gradient(circle at 0 0, rgba(251, 191, 36, 0.16), transparent 55%),
    radial-gradient(
      circle at 100% 0,
      rgba(56, 189, 248, 0.18),
      transparent 55%
    ),
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.96));
  box-shadow: var(--shadow-soft);
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 26px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .hero {
  background:
    radial-gradient(circle at 0 0, rgba(251, 191, 36, 0.12), transparent 55%),
    radial-gradient(
      circle at 100% 0,
      rgba(59, 130, 246, 0.15),
      transparent 55%
    ),
    linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(2, 6, 23, 0.98));
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px 4px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.04);
  color: var(--text-soft);
  font-size: 12px;
  margin-bottom: 8px;
}

.hero-badge-dot {
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.hero-title {
  font-size: clamp(26px, 3.1vw, 32px);
  line-height: 1.25;
  margin: 0 0 8px;
  letter-spacing: 0.03em;
}

.hero-highlight {
  background: linear-gradient(120deg, #f97360, #f59e0b);
  -webkit-background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: 14px;
  color: var(--text-soft);
  margin-bottom: 14px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 12px;
  color: var(--text-soft);
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-cta {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn-primary,
.btn-ghost {
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast), background var(--transition-fast),
    color var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background: radial-gradient(circle at 0 0, #fed7aa, transparent 55%),
    linear-gradient(135deg, #f97360, #f59e0b);
  color: #111827;
  box-shadow: 0 18px 40px rgba(248, 113, 113, 0.55);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 24px 54px rgba(248, 113, 113, 0.7);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--text-soft);
}

.btn-ghost:hover {
  background: rgba(148, 163, 184, 0.08);
  color: var(--accent);
}

.hero-visual {
  position: relative;
  min-height: 210px;
}

.hero-card {
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: radial-gradient(
      circle at 0 0,
      rgba(248, 250, 252, 0.96),
      rgba(241, 245, 249, 0.98)
    ),
    url("https://picsum.photos/seed/studyhero/1200/800") center/cover no-repeat;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

[data-theme="dark"] .hero-card {
  background: radial-gradient(
      circle at 0 0,
      rgba(15, 23, 42, 0.8),
      rgba(15, 23, 42, 0.96)
    ),
    url("https://picsum.photos/seed/studyherodark/1200/800") center/cover
      no-repeat;
}

.hero-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(15, 23, 42, 0.78),
    rgba(15, 23, 42, 0.05)
  );
}

.hero-card-inner {
  position: absolute;
  inset: 0;
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: #f9fafb;
}

.hero-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  font-size: 11px;
}

.hero-pill {
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(16px);
}

.hero-stats {
  display: flex;
  gap: 8px;
}

.hero-stat {
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.65);
}

.hero-card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
}

.hero-progress {
  flex: 1;
}

.hero-progress-label {
  font-size: 11px;
  margin-bottom: 3px;
}

.hero-progress-bar {
  width: 100%;
  height: 5px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.6);
  overflow: hidden;
}

.hero-progress-fill {
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #bef264, #f97360);
}

.hero-streak {
  font-size: 11px;
  text-align: right;
}

.section-header {
  margin-top: 30px;
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.section-title {
  font-size: 18px;
  font-weight: 600;
}

.section-subtitle {
  font-size: 12px;
  color: var(--text-soft);
}

.section-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chip {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-soft);
}

.search-input {
  position: relative;
}

.search-input input {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 6px 26px 6px 26px;
  font-size: 12px;
  outline: none;
  background: rgba(248, 250, 252, 0.9);
  color: var(--text);
  min-width: 160px;
}

[data-theme="dark"] .search-input input {
  background: rgba(15, 23, 42, 0.93);
}

.search-input-icon {
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  color: var(--text-soft);
}

.search-input-kbd {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 10px;
  color: var(--text-soft);
  border-radius: 5px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 1px 4px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 260px;
  transform: translateY(0);
  transition: transform var(--transition-med),
    box-shadow var(--transition-med), background var(--transition-med);
}

[data-theme="dark"] .article-card {
  background: radial-gradient(circle at 0 0, #0b1120, #020617);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 50px rgba(15, 23, 42, 0.45);
}

.article-cover {
  position: relative;
  padding-bottom: 60%;
  overflow: hidden;
}

.article-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-tag {
  position: absolute;
  left: 10px;
  top: 10px;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 11px;
  background: rgba(15, 23, 42, 0.7);
  color: #f9fafb;
}

.article-body {
  padding: 12px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.article-title {
  font-size: 15px;
  font-weight: 600;
}

.article-excerpt {
  font-size: 13px;
  color: var(--text-soft);
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--text-soft);
  margin-top: 6px;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-footer {
  padding: 8px 14px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--primary);
}

.badge {
  border-radius: 999px;
  padding: 2px 8px;
  background: var(--primary-soft);
  color: var(--primary);
}

.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  padding: 18px 20px 26px;
  font-size: 12px;
  color: var(--text-soft);
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.footer-links {
  display: flex;
  gap: 12px;
}

.about-layout {
  max-width: 860px;
  margin: 10px auto 40px;
  padding: 18px 20px 22px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-soft);
}

[data-theme="dark"] .about-layout {
  background: radial-gradient(circle at 0 0, #020617, #020617);
}

.about-title {
  font-size: 22px;
  margin: 0 0 6px;
}

.about-subtitle {
  font-size: 13px;
  color: var(--text-soft);
  margin-bottom: 16px;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 20px;
}

.about-card {
  padding: 14px 14px 12px;
  border-radius: 18px;
  background: rgba(248, 250, 252, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

[data-theme="dark"] .about-card {
  background: radial-gradient(circle at 0 0, #020617, #020617);
}

.about-card h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.about-card p,
.about-card li {
  font-size: 13px;
  line-height: 1.7;
}

.about-card ul {
  padding-left: 18px;
  margin: 0;
}

.about-meta {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 11px;
  color: var(--text-soft);
}

.article-page {
  max-width: 840px;
  margin: 14px auto 40px;
  padding: 18px 20px 22px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-soft);
}

[data-theme="dark"] .article-page {
  background: radial-gradient(circle at 0 0, #020617, #020617);
}

.article-page-header {
  margin-bottom: 16px;
}

.article-page-title {
  font-size: 24px;
  margin: 0 0 4px;
}

.article-page-meta {
  font-size: 12px;
  color: var(--text-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.article-page-cover {
  margin: 14px 0 14px;
  border-radius: 18px;
  overflow: hidden;
}

.article-page-content {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.article-page-content h2 {
  font-size: 19px;
  margin-top: 18px;
  margin-bottom: 8px;
}

.article-page-content h3 {
  font-size: 16px;
  margin-top: 14px;
  margin-bottom: 6px;
}

.article-page-content p {
  margin: 6px 0;
}

.article-page-content ul,
.article-page-content ol {
  padding-left: 20px;
  margin: 6px 0 10px;
}

.article-page-content li {
  margin-bottom: 3px;
}

.article-callout {
  margin-top: 16px;
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--primary-soft);
  font-size: 13px;
  color: var(--text);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-soft);
  margin-bottom: 10px;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1.6fr);
  }

  .hero-visual {
    display: none;
  }

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

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

@media (max-width: 640px) {
  .header-inner {
    padding-inline: 14px;
  }

  .brand-subtitle {
    display: none;
  }

  .nav {
    gap: 8px;
  }

  .nav a {
    padding-inline: 8px;
  }

  .layout {
    padding-inline: 14px;
  }

  .hero {
    padding: 18px 16px 16px;
  }

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

  .site-footer {
    padding-inline: 14px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}