:root {
  --color-bg: #ffffff;
  --color-bg-off: #f8fafc;
  --color-bg-card: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-soft: #475569;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-light: #eff6ff;
  --color-accent-glow: rgba(37, 99, 235, 0.12);
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-surface: #f8fafc;
  --color-success: #10b981;
  --color-success-dim: rgba(16, 185, 129, 0.08);
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-hero-start: #0f172a;
  --color-hero-mid: #1e293b;
  --color-hero-end: #0f172a;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 4px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── MAIN ── */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── HEADER ── */
.header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #ffffff;
  background: var(--color-accent);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.header-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

.header-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.header-nav {
  display: flex;
  gap: 0.5rem;
}

.header-nav a {
  color: var(--color-text-soft);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  background: var(--color-bg-card);
  box-shadow: var(--shadow-sm);
}

.header-nav a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  box-shadow: var(--shadow-md);
}

/* ── DROPDOWN NAV ── */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

.nav-dropdown::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 12px;
  z-index: 99;
}

.nav-dropdown-menu {
  opacity: 0;
  visibility: hidden;
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.7rem;
  min-width: 180px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  padding: 0.35rem 0;
  transition: opacity 0.15s ease, visibility 0s linear 0.2s;
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.15s ease, visibility 0s linear 0s;
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.6rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-soft);
  text-decoration: none;
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transition: all 0.15s;
}

.nav-dropdown-menu a:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
  border: none;
}

/* ── LANGUAGE SWITCHER ── */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-soft);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-sm);
  user-select: none;
}

.lang-switch span {
  cursor: pointer;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  transition: all 0.2s;
  color: var(--color-text-muted);
}

.lang-switch span:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.lang-switch span.active {
  color: var(--color-accent);
  font-weight: 600;
  background: var(--color-accent-light);
}

.lang-sep {
  color: var(--color-border);
  cursor: default !important;
}

.lang-sep:hover {
  color: var(--color-border) !important;
  background: transparent !important;
}

/* ── BANNER ── */
.banner-container {
  max-width: 1200px;
  margin: 32px auto;
  padding: 0 2rem;
}

.banner-container svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ── FOOTER ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  max-width: 1200px;
  margin: 0 auto;
}

.footer a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 500;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--color-text);
}

.footer-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ═══════════════════════════════════════════ */
/* GLOBAL SECTION STYLES                       */
/* ═══════════════════════════════════════════ */
.section {
  padding: 5rem 0;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.8px;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ═══════════════════════════════════════════ */
/* FEATURES (4-Column)                         */
/* ═══════════════════════════════════════════ */
.features-section {
  background: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.feature-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.feature-icon-blue {
  background: #eff6ff;
  color: #2563eb;
}

.feature-icon-green {
  background: #ecfdf5;
  color: #10b981;
}

.feature-icon-purple {
  background: #f5f3ff;
  color: #7c3aed;
}

.feature-icon-amber {
  background: #fffbeb;
  color: #f59e0b;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.6rem;
  letter-spacing: -0.2px;
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ═══════════════════════════════════════════ */
/* DASHBOARD MOCKUP                            */
/* ═══════════════════════════════════════════ */
.dashboard-section {
  background: var(--color-bg-off);
}

.dashboard-mockup {
  max-width: 900px;
  margin: 0 auto;
  background: #0f172a;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid #1e293b;
}

.dashboard-topbar {
  display: flex;
  align-items: center;
  padding: 0.8rem 1.2rem;
  background: #1e293b;
  gap: 0.8rem;
}

.dashboard-topbar-dots {
  display: flex;
  gap: 0.4rem;
}

.dashboard-topbar-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.dashboard-topbar-title {
  font-size: 0.75rem;
  color: #94a3b8;
  font-family: "JetBrains Mono", monospace;
}

.dashboard-topbar-spacer {
  flex: 1;
}

.dashboard-body {
  padding: 1.5rem;
}

.dashboard-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.dashboard-card {
  background: #1e293b;
  border-radius: 10px;
  padding: 1rem 1.1rem;
  border: 1px solid #334155;
}

.dashboard-card-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #64748b;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.dashboard-card-value {
  margin-bottom: 0.6rem;
}

.dash-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: #f1f5f9;
}

.dash-unit {
  font-size: 0.75rem;
  color: #64748b;
  margin-left: 0.2rem;
}

.dashboard-bar {
  height: 4px;
  background: #334155;
  border-radius: 2px;
  overflow: hidden;
}

.dashboard-bar-fill {
  height: 100%;
  border-radius: 2px;
}

.dashboard-bar-fill-green { background: #10b981; }
.dashboard-bar-fill-blue { background: #3b82f6; }
.dashboard-bar-fill-amber { background: #f59e0b; }

.dashboard-services {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.dashboard-service {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #1e293b;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  border: 1px solid #334155;
}

.dash-service-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dash-service-dot-green { background: #10b981; }

.dash-service-name {
  flex: 1;
  font-size: 0.8rem;
  color: #cbd5e1;
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
}

.dash-service-status {
  font-size: 0.72rem;
  color: #10b981;
  font-weight: 500;
  padding: 0.15rem 0.6rem;
  background: rgba(16, 185, 129, 0.1);
  border-radius: 4px;
}

.dash-service-ms {
  font-size: 0.72rem;
  color: #64748b;
  font-family: "JetBrains Mono", monospace;
}

/* ═══════════════════════════════════════════ */
/* COMPARISON TABLE                            */
/* ═══════════════════════════════════════════ */
.compare-section {
  background: var(--color-bg);
}

.compare-table-wrap {
  max-width: 900px;
  margin: 0 auto;
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.compare-table th {
  background: var(--color-bg-off);
  padding: 1rem 1.25rem;
  text-align: left;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.compare-table th:first-child {
  border-right: 1px solid var(--color-border);
}

.compare-table td {
  padding: 0.85rem 1.25rem;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--color-border-light);
}

.compare-table td:first-child {
  border-right: 1px solid var(--color-border);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.compare-label-accent {
  color: var(--color-accent);
}

.compare-feature {
  font-weight: 600;
  color: var(--color-text);
}

.compare-bad {
  color: var(--color-text-muted);
}

.compare-good {
  color: var(--color-text);
  font-weight: 500;
}

.compare-icon {
  font-size: 0.7rem;
  margin-right: 0.3rem;
}

.compare-good .compare-icon {
  color: var(--color-accent);
  font-weight: 700;
}

.compare-bad .compare-icon {
  color: var(--color-text-muted);
}

/* ═══════════════════════════════════════════ */
/* CODE BLOCKS                                 */
/* ═══════════════════════════════════════════ */
.code-section {
  background: var(--color-bg-off);
}

.code-blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto 2rem;
}

.code-block {
  background: #0f172a;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid #1e293b;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: #1e293b;
}

.code-block-dots {
  display: flex;
  gap: 0.35rem;
}

.code-block-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.code-block-dots span:nth-child(1) { background: #ef4444; }
.code-block-dots span:nth-child(2) { background: #f59e0b; }
.code-block-dots span:nth-child(3) { background: #10b981; }

.code-block-lang {
  font-size: 0.68rem;
  color: #64748b;
  font-family: "JetBrains Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.code-block-pre {
  padding: 1.25rem 1.25rem;
  margin: 0;
  overflow-x: auto;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.code-block-pre code {
  font-family: inherit;
}

.code-prompt {
  color: #64748b;
  margin-right: 0.5rem;
  user-select: none;
}

.code-key {
  color: #94a3b8;
}

.code-str {
  color: #60a5fa;
}

.code-footer {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.code-footer p {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  background: var(--color-bg-card);
  padding: 0.65rem 1.25rem;
  border-radius: 100px;
  border: 1px solid var(--color-border);
}

.code-footer svg {
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════ */
/* PROJECT CARDS (Bento-light)                 */
/* ═══════════════════════════════════════════ */
.projects-section {
  background: var(--color-bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.project-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.project-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--color-accent-light);
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.project-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.3px;
}

.project-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card-bottom {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-card-tag {
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 500;
}

.project-card-meta {
  display: flex;
  gap: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.project-card-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text);
}

.project-card-meta-label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  font-weight: 600;
  color: var(--color-text-muted);
}

/* ═══════════════════════════════════════════ */
/* DETAIL PAGE STYLES                          */
/* ═══════════════════════════════════════════ */
.detail-header {
  padding: 3rem 0 2rem;
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 1.5rem;
  transition: color 0.2s;
}

.detail-back:hover {
  color: var(--color-accent);
}

.detail-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.8px;
  margin-bottom: 0.75rem;
}

.detail-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.detail-meta time {
  font-weight: 500;
}

.bento-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.bento-tag {
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 500;
}

.detail-article {
  padding: 0 0 4rem;
  max-width: 750px;
}

.detail-article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.4px;
}

.detail-article h2:first-child {
  margin-top: 0;
}

.detail-article p {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.detail-article ul,
.detail-article ol {
  margin: 0.5rem 0 1.25rem 1.25rem;
  color: var(--color-text-soft);
  line-height: 1.9;
  font-size: 0.95rem;
}

.detail-article li {
  margin-bottom: 0.3rem;
}

.detail-article strong {
  color: var(--color-text);
  font-weight: 700;
}

.detail-article a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--color-accent-light);
  transition: border-color 0.2s;
}

.detail-article a:hover {
  border-bottom-color: var(--color-accent);
}

.detail-article table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: 1rem 0 1.5rem;
  font-size: 0.9rem;
}

.detail-article th {
  background: var(--color-bg-off);
  padding: 0.65rem 1rem;
  text-align: left;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.detail-article td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-soft);
}

.detail-article tr:last-child td {
  border-bottom: none;
}

/* ═══════════════════════════════════════════ */
/* RESPONSIVE                                  */
/* ═══════════════════════════════════════════ */
@media (max-width: 900px) {
  .section-title,
  .detail-title {
    font-size: 1.8rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .dashboard-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .code-blocks {
    grid-template-columns: 1fr;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header {
    padding: 1rem 1.25rem;
  }
  .header-nav a {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
  .footer {
    padding: 1.5rem 1.25rem;
  }
}

@media (max-width: 540px) {
  .section {
    padding: 3rem 0;
  }
  .section-container {
    padding: 0 1.25rem;
  }
  .section-title,
  .detail-title {
    font-size: 1.5rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .dashboard-row {
    grid-template-columns: 1fr;
  }
  .compare-table th,
  .compare-table td {
    padding: 0.6rem 0.75rem;
    font-size: 0.75rem;
  }
}