/* ============================================================
   Portfolio — Lightweight Design System
   Django + plain CSS. No build step. No heavy frameworks.
   ============================================================ */

/* ── Variables ── */
:root {
  --color-bg: #FFFFFF;
  --color-bg-soft: #F8FAFC;
  --color-text: #111827;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94A3B8;
  --color-border: #E2E8F0;
  --color-border-strong: #CBD5E1;
  --color-primary: #0EA5E9;
  --color-primary-hover: #0284C7;
  --color-primary-subtle: #E0F2FE;
  --color-accent: #14B8A6;
  --color-accent-subtle: #CCFBF1;
  --color-warm: #FEF3C7;
  --color-warm-text: #B45309;

  --font-sans: "Inter", "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --container-max: 1152px;
  --header-height: 64px;

  --transition-fast: 150ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-emphasis: 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

h1, h2, h3, h4, h5, h6, p {
  margin-top: 0;
}

ul, ol {
  margin: 0;
  padding-left: 1.5em;
}

/* ── Skip link ── */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-4);
  z-index: 200;
  border-radius: 0 0 var(--radius-sm) 0;
  font-size: 14px;
}

.skip-link:focus {
  top: 0;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  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);
  }
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

@media (min-width: 1024px) {
  .section {
    padding-top: var(--space-20);
    padding-bottom: var(--space-20);
  }
}

.section-alt {
  background-color: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  margin-bottom: var(--space-10);
}

.section-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.section-description {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition-base);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.logo:hover {
  color: var(--color-primary);
}

/* ── Navigation ── */
.site-nav {
  display: none;
}

@media (min-width: 768px) {
  .site-nav {
    display: block;
  }
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.nav-link-external {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link-external::after {
  content: "↗";
  font-size: 12px;
}

/* ── Mobile nav toggle ── */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header.nav-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header.nav-open .site-nav {
  display: block;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4);
}

.site-header.nav-open .nav-list {
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

/* ── Hero ── */
.hero {
  min-height: calc(100dvh - var(--header-height));
  display: flex;
  align-items: center;
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
  position: relative;
  overflow: hidden;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background-color: var(--color-primary-subtle);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -24px;
  left: -30px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background-color: var(--color-accent-subtle);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 140px 1fr;
    gap: var(--space-12);
  }
}

.hero-avatar {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .hero-avatar {
    width: 140px;
    height: 140px;
  }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.hero-role {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.hero-value {
  font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--color-text);
  max-width: 640px;
  margin-bottom: var(--space-6);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

@media (min-width: 640px) {
  .hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.hero-stat {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.hero-stat::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
  flex-shrink: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 16px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-primary);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg-soft);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn-tertiary {
  background-color: transparent;
  color: var(--color-text);
}

.btn-tertiary:hover {
  background-color: var(--color-bg-soft);
  color: var(--color-text);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* ── Cards ── */
.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(14, 165, 233, 0.08);
  border-color: var(--color-primary-subtle);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.card-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.card-text:last-child {
  margin-bottom: 0;
}

.card-meta {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}

.card-media {
  width: 100%;
  max-width: none;
  height: 100%;
  margin: 0;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

/* ── Skills ── */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.skill-category {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.skill-category:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.skill-category-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary-subtle);
}

.skill-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.skill-item {
  font-size: 14px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.skill-item::before {
  content: "—";
  color: var(--color-text-tertiary);
}

/* ── Projects ── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.project-section .container {
  max-width: 1320px;
}

@media (min-width: 960px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  --project-card-padding: clamp(20px, 2.4vw, 32px);
  padding: var(--project-card-padding);
}

.project-carousel {
  position: relative;
  width: calc(100% + (var(--project-card-padding) * 2));
  margin: calc(-1 * var(--project-card-padding)) calc(-1 * var(--project-card-padding)) var(--space-6);
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.16), transparent 40%),
    linear-gradient(180deg, #f8fbff 0%, #eef6ff 100%);
  border-bottom: 1px solid var(--color-border);
}

.project-carousel-shell {
  position: relative;
  aspect-ratio: 16 / 10;
  min-height: clamp(240px, 30vw, 360px);
  overflow: hidden;
}

.project-carousel:focus-visible {
  outline: 2px solid rgba(14, 165, 233, 0.22);
  outline-offset: 2px;
}

.project-carousel-track,
.project-carousel-slide {
  width: 100%;
  height: 100%;
}

.project-carousel-track {
  position: relative;
}

.project-carousel-slide {
  display: none;
  position: absolute;
  inset: 0;
  margin: 0;
  padding: var(--space-4);
}

.project-carousel-slide.active {
  display: flex;
}

.project-slide-media {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-carousel-captions {
  min-height: 68px;
  padding: 14px var(--space-4) 0;
}

.project-carousel-caption {
  display: none;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,250,252,0.96) 100%);
}

.project-carousel-caption.active {
  display: block;
}

.project-caption-label {
  margin: 0 0 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.project-image-caption {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--color-text-secondary);
  word-break: break-word;
}

.project-image-caption-muted {
  color: var(--color-text-tertiary);
}

.project-carousel-thumbs {
  position: absolute;
  left: 50%;
  bottom: 14px;
  z-index: 2;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.18);
  backdrop-filter: blur(6px);
}

.project-carousel-thumb {
  appearance: none;
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.52);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    width var(--transition-fast);
}

.project-carousel-thumb:hover,
.project-carousel-thumb:focus-visible {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.82);
}

.project-carousel-thumb.active {
  width: 22px;
  background: #ffffff;
}

.project-carousel-control {
  position: absolute;
  top: 50%;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-text);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  transform: translateY(-50%);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.project-carousel-control:hover,
.project-carousel-control:focus-visible {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-bg);
}

.project-carousel-prev {
  left: var(--space-3);
}

.project-carousel-next {
  right: var(--space-3);
}

.project-carousel-count {
  display: none;
}

.project-card .card-text {
  flex-grow: 1;
  font-size: clamp(1rem, 0.4vw + 0.95rem, 1.0625rem);
  line-height: 1.85;
  margin-bottom: var(--space-5);
}

.project-card .card-title {
  font-size: clamp(1.25rem, 0.6vw + 1.1rem, 1.5rem);
  line-height: 1.25;
  margin-bottom: var(--space-3);
}

.project-card .card-meta {
  font-size: 14px;
  margin-bottom: var(--space-4);
}

.project-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

@media (max-width: 959px) {
  .project-carousel-shell {
    aspect-ratio: 4 / 3;
    min-height: 220px;
  }

  .project-carousel-captions {
    min-height: 76px;
  }
}

@media (max-width: 767px) {
  .project-card {
    --project-card-padding: var(--space-5);
  }

  .project-carousel {
    margin-bottom: var(--space-4);
  }

  .project-carousel-slide {
    padding: var(--space-3);
  }

  .project-carousel-captions {
    min-height: 0;
    padding: 12px var(--space-3) 0;
  }

  .project-carousel-caption {
    padding: 10px 12px;
  }

  .project-image-caption {
    font-size: 13px;
    line-height: 1.5;
  }

  .project-carousel-thumbs {
    bottom: 10px;
    gap: 7px;
    padding: 5px 8px;
  }

  .project-carousel-control {
    width: 38px;
    height: 38px;
  }

  .project-card .card-title {
    font-size: 1.25rem;
  }

  .project-card .card-text {
    font-size: 1rem;
    line-height: 1.75;
  }
}

@media (max-width: 479px) {
  .project-carousel-shell {
    aspect-ratio: 5 / 4;
    min-height: 180px;
  }

  .project-carousel-slide {
    padding: var(--space-2);
  }

  .project-carousel-captions {
    padding: 10px var(--space-2) 0;
  }

  .project-carousel-caption {
    padding: 10px;
  }

  .project-caption-label {
    font-size: 10px;
    margin-bottom: 5px;
  }

  .project-image-caption {
    font-size: 12px;
    line-height: 1.45;
  }

  .project-carousel-thumbs {
    bottom: 8px;
    gap: 6px;
    padding: 4px 7px;
  }

  .project-carousel-thumb {
    width: 8px;
    height: 8px;
  }

  .project-carousel-thumb.active {
    width: 18px;
  }

  .project-carousel-prev {
    left: var(--space-2);
  }

  .project-carousel-next {
    right: var(--space-2);
  }

  .project-carousel-control {
    width: 34px;
    height: 34px;
    font-size: 22px;
  }
}

/* ── Experience ── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.timeline-item {
  position: relative;
  padding-left: var(--space-6);
  border-left: 1px solid var(--color-border);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.timeline-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

@media (min-width: 640px) {
  .timeline-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
  }
}

.timeline-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.timeline-company {
  font-size: 15px;
  color: var(--color-text-secondary);
}

.timeline-date {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  white-space: nowrap;
}

.timeline-body {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ── Education & Awards ── */
.split-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 768px) {
  .split-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-12);
  }
}

.split-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.edu-item,
.award-item {
  margin-bottom: var(--space-5);
}

.edu-school,
.award-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.edu-detail,
.award-date {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.award-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.award-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: 0;
}

.award-item::before {
  content: "•";
  color: var(--color-accent);
  font-weight: 700;
}

/* ── SEO Trends ── */
.seo-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.seo-featured-card {
  background: linear-gradient(135deg, var(--color-primary-subtle), #F8FCFF 55%, var(--color-bg));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.seo-featured-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.seo-featured-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-primary-hover);
  font-size: 12px;
  font-weight: 700;
}

.seo-card-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .seo-card-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.seo-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.seo-card-date {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.seo-content {
  line-height: 1.8;
  color: #475569;
  word-break: break-word;
  overflow-wrap: break-word;
}

.seo-content-full {
  display: none;
}

.seo-content-static {
  color: #475569;
  word-break: break-word;
  overflow-wrap: break-word;
}

.seo-content-static p:last-child {
  margin-bottom: 0;
}

.seo-toggle-btn {
  margin-top: var(--space-3);
}

.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.tech-daily-hero {
  padding-bottom: var(--space-10);
}

.tech-daily-list {
  display: grid;
  gap: var(--space-4);
}

.article-shell {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 1024px) {
  .article-shell {
    grid-template-columns: minmax(0, 2fr) minmax(280px, 0.9fr);
    align-items: start;
  }
}

.article-main {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 40px);
}

.article-sidebar {
  position: relative;
}

.article-kicker {
  display: inline-flex;
  margin-bottom: var(--space-3);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary-hover);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  color: var(--color-text-secondary);
  font-size: 14px;
}

.article-slug {
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
}

.article-content > *:last-child {
  margin-bottom: 0;
}

.article-related-list {
  display: grid;
  gap: var(--space-3);
}

.article-related-item {
  display: grid;
  gap: 4px;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  background-color: var(--color-bg-soft);
}

.article-related-item span {
  font-size: 13px;
  color: var(--color-text-secondary);
}

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

@media (min-width: 1024px) {
  .manage-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

.manage-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.content-form {
  display: grid;
  gap: var(--space-4);
}

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.form-input,
.form-textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font: inherit;
  color: var(--color-text);
  background-color: var(--color-bg);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-subtle);
}

.form-textarea {
  resize: vertical;
  min-height: 220px;
  line-height: 1.7;
}

.manage-list {
  display: grid;
  gap: var(--space-3);
}

.manage-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-soft);
}

.manage-item-copy {
  min-width: 0;
}

.manage-item-title {
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

.manage-item-meta {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

.status-banner {
  margin-bottom: var(--space-5);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
}

.status-banner-success {
  background-color: #ECFDF5;
  border: 1px solid #A7F3D0;
  color: #065F46;
}

.status-banner-error {
  background-color: #FEF2F2;
  border: 1px solid #FECACA;
  color: #991B1B;
}

/* ── Contact ── */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 15px;
}

.contact-label {
  font-weight: 500;
  color: var(--color-text);
  min-width: 80px;
}

.contact-value {
  color: var(--color-text-secondary);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-copy {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: var(--space-5);
}

.footer-links a {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: var(--color-primary);
}

/* ── Pagination ── */
.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-item {
  display: inline-flex;
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--space-3);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.page-link:hover {
  background-color: var(--color-bg-soft);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.page-item.active .page-link {
  background-color: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}

.page-item.disabled .page-link {
  color: var(--color-text-tertiary);
  cursor: not-allowed;
}

/* ── Utilities ── */
.text-secondary {
  color: var(--color-text-secondary);
}

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

.mb-0 {
  margin-bottom: 0;
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mt-8 {
  margin-top: var(--space-8);
}

/* ── Scroll reveal animation ── */
.reveal {
  opacity: 1;
  transform: none;
}

.reveal.reveal-pending {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-emphasis), transform var(--transition-emphasis);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.reveal-pending {
    opacity: 1;
    transform: none;
    transition: none;
  }
}