/* ==========================================================================
   nice-cloud.mom · Liquid Holographic Glass (液态全息玻璃) Design System
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-dark: #080a14;
  --bg-card: rgba(18, 22, 40, 0.58);
  --bg-card-hover: rgba(26, 32, 58, 0.72);
  --bg-card-elevated: rgba(28, 35, 64, 0.75);
  
  /* Holographic Liquid Accent Gradients */
  --holo-cyan: #38bdf8;
  --holo-indigo: #818cf8;
  --holo-purple: #c084fc;
  --holo-rose: #f43f5e;
  --holo-pink: #f472b6;
  
  --grad-holo: linear-gradient(135deg, #38bdf8 0%, #818cf8 35%, #c084fc 70%, #f43f5e 100%);
  --grad-holo-soft: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(129, 140, 248, 0.15) 35%, rgba(192, 132, 252, 0.15) 70%, rgba(244, 63, 94, 0.15) 100%);
  --grad-glass-border: linear-gradient(135deg, rgba(255, 255, 255, 0.28) 0%, rgba(192, 132, 252, 0.25) 50%, rgba(56, 189, 248, 0.2) 100%);
  --grad-specular: linear-gradient(180deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);

  /* Typography */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-bright: #ffffff;
  
  /* Glass Shadows & Glows */
  --shadow-glass: 0 12px 36px 0 rgba(0, 0, 0, 0.38), inset 0 1px 1px 0 rgba(255, 255, 255, 0.15);
  --shadow-holo-glow: 0 0 25px rgba(129, 140, 248, 0.25);
  --shadow-cta: 0 8px 24px rgba(192, 132, 252, 0.35);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 72px;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-main);
  background-color: var(--bg-dark);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-dark);
  display: flex;
  flex-direction: column;
}

/* Fluid Holographic Background Effect */
.bg-liquid-cosmos {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.liquid-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.38;
  animation: floatOrb 18s ease-in-out infinite alternate;
  will-change: transform;
}

.orb-1 {
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, #38bdf8 0%, rgba(56, 189, 248, 0) 70%);
  top: -10%;
  left: -10%;
  animation-duration: 22s;
}

.orb-2 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #8b5cf6 0%, rgba(139, 92, 246, 0) 70%);
  top: 35%;
  right: -15%;
  animation-duration: 26s;
  animation-delay: -5s;
}

.orb-3 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, #f43f5e 0%, rgba(244, 63, 94, 0) 70%);
  bottom: -10%;
  left: 20%;
  animation-duration: 20s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(40px, -30px, 0) scale(1.08); }
  100% { transform: translate3d(-30px, 35px, 0) scale(0.95); }
}

/* Subtle noise texture */
.bg-noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  opacity: 0.025;
  background-image: radial-gradient(#ffffff 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

/* ==========================================================================
   Typography & Links
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--text-bright);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(1.85rem, 4vw + 0.5rem, 3rem);
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.4rem, 2.5vw + 0.3rem, 2rem);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.15rem, 1.8vw + 0.2rem, 1.45rem);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
  color: #cbd5e1;
}

a {
  color: var(--holo-cyan);
  text-decoration: none;
  transition: all 0.25s ease;
}

a:hover {
  color: var(--holo-purple);
  text-decoration: underline;
}

.text-gradient {
  background: var(--grad-holo);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

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

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

/* ==========================================================================
   Glassmorphism Components
   ========================================================================== */

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  padding: clamp(1.25rem, 3vw, 2rem);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
              border-color 0.3s ease, 
              box-shadow 0.3s ease;
}

.glass-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--grad-specular);
  opacity: 0.7;
}

.glass-card:hover {
  border-color: rgba(192, 132, 252, 0.35);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 20px rgba(129, 140, 248, 0.2);
  transform: translateY(-2px);
}

.glass-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: #e2e8f0;
}

.glass-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: rgba(56, 189, 248, 0.12);
  color: #7dd3fc;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.glass-badge.purple {
  background: rgba(192, 132, 252, 0.12);
  color: #d8b4fe;
  border-color: rgba(192, 132, 252, 0.3);
}

.glass-badge.rose {
  background: rgba(244, 63, 94, 0.12);
  color: #fda4af;
  border-color: rgba(244, 63, 94, 0.3);
}

/* ==========================================================================
   Buttons (Compliance Strictly Followed)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none !important;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  min-height: 48px;
  white-space: nowrap;
}

.btn-cta {
  background: var(--grad-holo);
  color: #ffffff !important;
  box-shadow: var(--shadow-cta);
  border: 1px solid rgba(255, 255, 255, 0.25);
  position: relative;
  overflow: hidden;
}

.btn-cta::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-20deg);
  transition: 0.75s;
}

.btn-cta:hover::after {
  left: 140%;
}

.btn-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 30px rgba(192, 132, 252, 0.5);
}

.btn-cta:active {
  transform: translateY(0) scale(0.98);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.15rem;
  font-size: 0.875rem;
  min-height: 38px;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(8, 10, 20, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.header-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none !important;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease;
  text-decoration: none !important;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link.active {
  color: var(--holo-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.mobile-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: #ffffff;
  padding: 0.6rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(8, 10, 20, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 99;
  padding: 2rem 1.5rem;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  overflow-y: auto;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mobile-nav-link {
  color: #e2e8f0;
  font-size: 1.15rem;
  font-weight: 600;
  display: block;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-decoration: none !important;
}

.mobile-nav-link.active {
  color: var(--holo-cyan);
  border-color: rgba(56, 189, 248, 0.3);
  background: rgba(56, 189, 248, 0.08);
}

/* ==========================================================================
   Layout Containers & Sections
   ========================================================================== */

.main-content {
  flex: 1;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container-narrow {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section-spacer {
  padding: clamp(3rem, 6vw, 5.5rem) 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto clamp(2rem, 4vw, 3.5rem);
}

.section-subtitle {
  font-size: clamp(1rem, 1.2vw + 0.2rem, 1.15rem);
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  padding: clamp(3rem, 7vw, 6.5rem) 0 clamp(2.5rem, 5vw, 4.5rem);
  text-align: center;
  position: relative;
}

.hero-pill-wrapper {
  margin-bottom: 1.5rem;
}

.hero-title {
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.hero-desc {
  font-size: clamp(1.05rem, 1.5vw + 0.2rem, 1.25rem);
  color: #cbd5e1;
  max-width: 760px;
  margin: 0 auto 2.25rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-disclaimer-pill {
  font-size: 0.825rem;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

/* ==========================================================================
   Feature & Step Cards
   ========================================================================== */

.step-card {
  position: relative;
  display: flex;
  flex-direction: column;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--grad-holo);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.step-title {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.step-text {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Notification / Alert Callout */
.callout {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  display: flex;
  gap: 1rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.callout-purple {
  background: rgba(192, 132, 252, 0.08);
  border-color: rgba(192, 132, 252, 0.25);
}

.callout-amber {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.25);
}

.callout-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  line-height: 1;
}

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

/* ==========================================================================
   Article Content Styling (GEO Style & Crawlability)
   ========================================================================== */

.article-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 1.5rem;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.article-toc {
  background: rgba(18, 22, 40, 0.7);
  border: 1px solid rgba(192, 132, 252, 0.25);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0 2.25rem;
}

.article-toc-title {
  font-size: 1rem;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.article-toc-list a {
  color: var(--text-muted);
  font-size: 0.925rem;
  text-decoration: none;
  transition: color 0.2s ease;
  display: block;
}

.article-toc-list a:hover {
  color: var(--holo-cyan);
  text-decoration: underline;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.article-body h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #f8fafc;
}

.article-body h3 {
  font-size: 1.25rem;
  margin-top: 1.8rem;
  margin-bottom: 0.6rem;
  color: #e2e8f0;
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

/* Responsive Table Wrapper */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 1.75rem 0;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(14, 18, 33, 0.6);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.925rem;
}

.data-table th {
  background: rgba(255, 255, 255, 0.05);
  color: #f8fafc;
  font-weight: 600;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  white-space: nowrap;
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: #cbd5e1;
}

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

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* FAQ Accordion Styling */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1.5rem 0;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(192, 132, 252, 0.3);
}

.faq-question {
  padding: 1.15rem 1.25rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: #f1f5f9;
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.35rem;
  color: var(--holo-cyan);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: 0.75rem;
}

details[open] .faq-question::after {
  content: "−";
  color: var(--holo-rose);
}

details[open] .faq-question {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.faq-answer {
  padding: 1.15rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #cbd5e1;
  background: rgba(0, 0, 0, 0.15);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--holo-cyan);
}

.breadcrumbs-separator {
  color: var(--text-dim);
}

/* Internal Links & Related Reading Section */
.related-articles {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.article-card-mini {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.article-card-mini:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(56, 189, 248, 0.3);
  transform: translateY(-2px);
}

.article-card-mini h4 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.article-card-mini p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Feedback Section (Real submission state) */
.feedback-box {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 2.5rem 0;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #e2e8f0;
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(10, 14, 26, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--holo-indigo);
  box-shadow: 0 0 10px rgba(129, 140, 248, 0.3);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: rgba(6, 8, 16, 0.88);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4rem 0 2.5rem;
  margin-top: auto;
  position: relative;
  z-index: 10;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.85rem;
  line-height: 1.6;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #f1f5f9;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease;
  text-decoration: none;
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.825rem;
  color: var(--text-dim);
}

/* Mobile Sticky Action Bar */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75rem 1.25rem;
  background: rgba(10, 13, 25, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  z-index: 95;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.4);
}

.mobile-sticky-cta .btn {
  width: 100%;
}

/* ==========================================================================
   Responsive Breakpoints
   320px, 375px, 390px, 768px, 1024px
   ========================================================================== */

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu, .nav-actions .btn {
    display: none;
  }
  .mobile-toggle {
    display: inline-flex;
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .mobile-sticky-cta {
    display: block;
  }
  body {
    padding-bottom: 64px; /* Space for sticky CTA */
  }
}

@media (max-width: 390px) {
  .container, .container-narrow {
    padding: 0 1rem;
  }
  .btn {
    width: 100%;
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
}

@media (max-width: 320px) {
  html {
    font-size: 14.5px;
  }
  .glass-card {
    padding: 1rem;
  }
  .brand-logo-img {
    height: 32px;
  }
}