/**
 * style.css — Memory Cube Website
 *
 * Mobile-first responsive website for memorycube.app
 * Uses the same 7-theme system as the Memory Cube app.
 * No external dependencies.
 */

/* ===========================================================
   Theme Variables — Night (default)
   =========================================================== */
:root {
  --mc-bg: #0f172a;
  --mc-text: #e2e8f0;
  --mc-text-hover: #f1f5f9;
  --mc-subtle: #94a3b8;
  --mc-muted: #8090a6;
  --mc-btn-text: #cbd5e1;
  --mc-face-bg: #1e293b;
  --mc-accent: #4a8df7;
  --mc-glow-border: rgba(74, 141, 247, 0.45);
  --mc-glow: rgba(74, 141, 247, 0.25);
  --mc-toolbar-bg: rgba(15, 23, 42, 0.92);
  --mc-toolbar-border: rgba(148, 163, 184, 0.15);
  --mc-title: #8b9cb5;
  --mc-overlay-bg: rgba(15, 23, 42, 0.97);
  --mc-panel-bg: rgba(15, 23, 42, 0.96);
  --mc-particle: rgba(148, 163, 184, 0.5);

  /* Website-specific extensions */
  --mc-accent-fill: #2563eb;
  --mc-accent-text: #fff;
  --mc-card-bg: rgba(30, 41, 59, 0.7);
  --mc-card-border: rgba(148, 163, 184, 0.12);
  --mc-section-alt: rgba(30, 41, 59, 0.4);
  --mc-divider: rgba(148, 163, 184, 0.1);
}

/* ---------- Dawn theme (05:00–08:00) ---------- */
.theme-dawn {
  --mc-bg: #fef3e2;
  --mc-text: #44403c;
  --mc-text-hover: #292524;
  --mc-subtle: #a8a29e;
  --mc-muted: #6b6359;
  --mc-btn-text: #57534e;
  --mc-face-bg: #fff7ed;
  --mc-accent: #f97316;
  --mc-glow-border: rgba(251, 146, 60, 0.5);
  --mc-glow: rgba(251, 146, 60, 0.3);
  --mc-toolbar-bg: rgba(254, 243, 226, 0.95);
  --mc-toolbar-border: rgba(168, 162, 158, 0.25);
  --mc-title: #74695f;
  --mc-overlay-bg: rgba(254, 243, 226, 0.97);
  --mc-panel-bg: rgba(254, 243, 226, 0.96);
  --mc-particle: rgba(251, 191, 36, 0.45);

  --mc-accent-fill: #f97316;
  --mc-card-bg: rgba(255, 247, 237, 0.7);
  --mc-card-border: rgba(168, 162, 158, 0.2);
  --mc-section-alt: rgba(255, 247, 237, 0.5);
  --mc-divider: rgba(168, 162, 158, 0.15);
}

/* ---------- Day theme (08:00–17:00) ---------- */
.theme-day {
  --mc-bg: #f8fafc;
  --mc-text: #1e293b;
  --mc-text-hover: #0f172a;
  --mc-subtle: #64748b;
  --mc-muted: #667586;
  --mc-btn-text: #475569;
  --mc-face-bg: #e2e8f0;
  --mc-accent: #2563eb;
  --mc-glow-border: rgba(37, 99, 235, 0.45);
  --mc-glow: rgba(37, 99, 235, 0.2);
  --mc-toolbar-bg: rgba(248, 250, 252, 0.95);
  --mc-toolbar-border: rgba(100, 116, 139, 0.2);
  --mc-title: #5d6d82;
  --mc-overlay-bg: rgba(248, 250, 252, 0.97);
  --mc-panel-bg: rgba(248, 250, 252, 0.96);
  --mc-particle: rgba(59, 130, 246, 0.35);

  --mc-accent-fill: #2563eb;
  --mc-card-bg: rgba(226, 232, 240, 0.5);
  --mc-card-border: rgba(100, 116, 139, 0.15);
  --mc-section-alt: rgba(226, 232, 240, 0.3);
  --mc-divider: rgba(100, 116, 139, 0.12);
}

/* ---------- Dusk theme (17:00–20:00) ---------- */
.theme-dusk {
  --mc-bg: #1e1b2e;
  --mc-text: #e0d5f0;
  --mc-text-hover: #f0ecf8;
  --mc-subtle: #a78bcc;
  --mc-muted: #9888b5;
  --mc-btn-text: #c4b5d9;
  --mc-face-bg: #2a2440;
  --mc-accent: #a855f7;
  --mc-glow-border: rgba(168, 85, 247, 0.45);
  --mc-glow: rgba(168, 85, 247, 0.25);
  --mc-toolbar-bg: rgba(30, 27, 46, 0.94);
  --mc-toolbar-border: rgba(167, 139, 204, 0.2);
  --mc-title: #a090c2;
  --mc-overlay-bg: rgba(30, 27, 46, 0.97);
  --mc-panel-bg: rgba(30, 27, 46, 0.96);
  --mc-particle: rgba(168, 85, 247, 0.4);

  --mc-accent-fill: #a855f7;
  --mc-card-bg: rgba(42, 36, 64, 0.7);
  --mc-card-border: rgba(167, 139, 204, 0.15);
  --mc-section-alt: rgba(42, 36, 64, 0.4);
  --mc-divider: rgba(167, 139, 204, 0.1);
}

/* ---------- Vintage theme (manual) ---------- */
.theme-vintage {
  --mc-bg: #f5f0e8;
  --mc-text: #5c4b3a;
  --mc-text-hover: #3e2f22;
  --mc-subtle: #9c8c7c;
  --mc-muted: #7a6e62;
  --mc-btn-text: #6b5b4a;
  --mc-face-bg: #ece5d8;
  --mc-accent: #c07830;
  --mc-glow-border: rgba(192, 120, 48, 0.45);
  --mc-glow: rgba(192, 120, 48, 0.25);
  --mc-toolbar-bg: rgba(245, 240, 232, 0.95);
  --mc-toolbar-border: rgba(156, 140, 124, 0.25);
  --mc-title: #78695a;
  --mc-overlay-bg: rgba(245, 240, 232, 0.97);
  --mc-panel-bg: rgba(245, 240, 232, 0.96);
  --mc-particle: rgba(192, 120, 48, 0.35);

  --mc-accent-fill: #c07830;
  --mc-card-bg: rgba(236, 229, 216, 0.7);
  --mc-card-border: rgba(156, 140, 124, 0.2);
  --mc-section-alt: rgba(236, 229, 216, 0.5);
  --mc-divider: rgba(156, 140, 124, 0.15);
}

/* ---------- Mono theme (manual) ---------- */
.theme-mono {
  --mc-bg: #111111;
  --mc-text: #e0e0e0;
  --mc-text-hover: #ffffff;
  --mc-subtle: #888888;
  --mc-muted: #8a8a8a;
  --mc-btn-text: #aaaaaa;
  --mc-face-bg: #222222;
  --mc-accent: #ffffff;
  --mc-glow-border: rgba(255, 255, 255, 0.35);
  --mc-glow: rgba(255, 255, 255, 0.15);
  --mc-toolbar-bg: rgba(17, 17, 17, 0.94);
  --mc-toolbar-border: rgba(136, 136, 136, 0.2);
  --mc-title: #969696;
  --mc-overlay-bg: rgba(17, 17, 17, 0.97);
  --mc-panel-bg: rgba(17, 17, 17, 0.96);
  --mc-particle: rgba(255, 255, 255, 0.3);

  --mc-accent-text: #111111;
  --mc-accent-fill: #ffffff;
  --mc-card-bg: rgba(34, 34, 34, 0.7);
  --mc-card-border: rgba(136, 136, 136, 0.15);
  --mc-section-alt: rgba(34, 34, 34, 0.4);
  --mc-divider: rgba(136, 136, 136, 0.1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: var(--mc-bg);
  color: var(--mc-text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

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

a {
  color: var(--mc-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--mc-text-hover);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ===========================================================
   Utility
   =========================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding: 48px 0;
}

.section-alt {
  background: var(--mc-section-alt);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--mc-text);
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--mc-subtle);
  text-align: center;
  margin-bottom: 32px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ===========================================================
   Navigation
   =========================================================== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--mc-toolbar-bg);
  border-bottom: 1px solid var(--mc-toolbar-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color 0.3s ease;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--mc-text);
  text-decoration: none;
  white-space: nowrap;
}

.nav-logo span {
  color: var(--mc-accent);
  font-weight: 600;
}

.nav-links {
  display: none;
  list-style: none;
  gap: 4px;
}

.nav-links a {
  display: block;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--mc-btn-text);
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--mc-text-hover);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Theme toggle button */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 1.1rem;
  color: var(--mc-btn-text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--mc-toolbar-border);
  transition: background 0.2s, border-color 0.2s;
  position: relative;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--mc-glow-border);
}

/* Hamburger menu button */
.nav-hamburger {
  width: 36px;
  height: 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--mc-toolbar-border);
  transition: background 0.2s;
}

.nav-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--mc-btn-text);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-hamburger:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Mobile menu overlay */
.mobile-menu {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--mc-overlay-bg);
  z-index: 999;
  padding: 24px 16px;
  overflow-y: auto;
}

.mobile-menu.is-open {
  display: block;
}

.mobile-menu-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu-links a {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--mc-btn-text);
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
}

.mobile-menu-links a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--mc-text-hover);
}

/* Theme picker dropdown */
.theme-picker {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: var(--mc-panel-bg);
  border: 1px solid var(--mc-toolbar-border);
  border-radius: 10px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, max-height 0.25s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1001;
  min-width: 140px;
}

.theme-picker.is-open {
  opacity: 1;
  max-height: 300px;
  pointer-events: auto;
}

.theme-swatch {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--mc-btn-text);
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.theme-swatch:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
}

.theme-swatch.is-active {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--mc-accent);
  color: var(--mc-text);
}

.theme-swatch__icon {
  font-size: 1rem;
  line-height: 1;
  width: 20px;
  text-align: center;
}

.theme-swatch__label {
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Body offset for fixed nav */
body {
  padding-top: 56px;
}

/* ===========================================================
   Hero Section
   =========================================================== */
.hero {
  text-align: center;
  padding: 48px 0 40px;
}

.hero-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mc-text);
  background: var(--mc-glow);
  border: 1px solid var(--mc-glow-border);
  border-radius: 20px;
  padding: 5px 14px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--mc-text);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.hero-title em {
  font-style: normal;
  color: var(--mc-accent);
}

.hero-description {
  font-size: 1rem;
  color: var(--mc-subtle);
  max-width: 900px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

.hero-image {
  max-width: 900px;
  margin: 0 auto 28px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--mc-card-border);
  box-shadow: 0 8px 32px var(--mc-glow);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--mc-accent-text);
  background: var(--mc-accent-fill);
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px var(--mc-glow);
  text-decoration: none;
}

.hero-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 28px var(--mc-glow);
  color: var(--mc-accent-text);
}

/* ===========================================================
   Demo Section
   =========================================================== */
.demo {
  padding: 40px 0;
}

.demo-frame {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 56.25%; /* 16:9 */
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--mc-card-border);
  background: var(--mc-face-bg);
  box-shadow: 0 4px 24px var(--mc-glow);
}

.demo-frame iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.demo-placeholder {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--mc-muted);
  font-size: 0.9rem;
}

/* ===========================================================
   Cards Section
   =========================================================== */
.cards {
  padding: 48px 0;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.card {
  background: var(--mc-card-bg);
  border: 1px solid var(--mc-card-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  color: inherit;
  display: block;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px var(--mc-glow);
  border-color: var(--mc-glow-border);
  color: inherit;
}

.card-thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--mc-face-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-thumb-placeholder {
  font-size: 2.5rem;
  opacity: 0.5;
}

.card-body {
  padding: 14px 16px;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--mc-text);
  margin-bottom: 4px;
}

.card-desc {
  font-size: 0.8rem;
  color: var(--mc-subtle);
  line-height: 1.5;
}

/* ===========================================================
   Pricing / Comparison Section
   =========================================================== */
.pricing {
  padding: 48px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--mc-card-bg);
  border: 1px solid var(--mc-card-border);
  border-radius: 14px;
  padding: 28px 24px;
  text-align: center;
  transition: border-color 0.2s;
}

.pricing-card--featured {
  border-color: var(--mc-accent);
  box-shadow: 0 4px 24px var(--mc-glow);
}

.pricing-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mc-accent);
  margin-bottom: 8px;
}

.pricing-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--mc-text);
  margin-bottom: 6px;
}

.pricing-desc {
  font-size: 0.85rem;
  color: var(--mc-subtle);
  margin-bottom: 20px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 0.85rem;
  color: var(--mc-text);
  border-bottom: 1px solid var(--mc-divider);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.feature-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
}

.feature-icon--yes {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
}

.feature-icon--no {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

.pricing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-width: 300px;
  max-width: 300px;
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

.pricing-btn--primary {
  color: var(--mc-accent-text);
  background: var(--mc-accent-fill);
  box-shadow: 0 4px 16px var(--mc-glow);
}

.pricing-btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--mc-glow);
  color: var(--mc-accent-text);
}

.pricing-btn--secondary {
  color: var(--mc-accent);
  background: transparent;
  border: 1px solid var(--mc-accent);
}

.pricing-btn--secondary:hover {
  background: var(--mc-glow);
  transform: translateY(-1px);
  color: var(--mc-accent);
}

/* ===========================================================
   Promotional Support Section
   =========================================================== */
.promo-support {
  padding: 48px 0;
}

.promo-container {
  background: var(--mc-card-bg);
  border: 1px solid var(--mc-card-border);
  border-radius: 14px;
  padding: 32px 24px;
  min-height: 200px;
  text-align: center;
}

.promo-container p {
  color: var(--mc-muted);
  font-size: 0.85rem;
}

/* ===========================================================
   Footer
   =========================================================== */
.site-footer {
  border-top: 1px solid var(--mc-divider);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.footer-link {
  font-size: 0.8rem;
  color: var(--mc-btn-text);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--mc-toolbar-border);
  transition: background 0.2s, color 0.2s;
}

.footer-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--mc-text-hover);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--mc-muted);
}

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

.footer-social a {
  color: var(--mc-muted);
  font-size: 0.85rem;
  transition: color 0.2s;
}

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

/* ===========================================================
   Modal
   =========================================================== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-overlay.is-open {
  display: flex;
}

.modal {
  background: var(--mc-panel-bg);
  border: 1px solid var(--mc-toolbar-border);
  border-radius: 14px;
  max-width: 640px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--mc-divider);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--mc-text);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 1.2rem;
  color: var(--mc-muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--mc-toolbar-border);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--mc-text-hover);
}

.modal-body {
  padding: 20px 24px 24px;
}

.modal-body h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--mc-text);
  margin: 16px 0 8px;
}

.modal-body h3:first-child {
  margin-top: 0;
}

.modal-body p {
  font-size: 0.85rem;
  color: var(--mc-subtle);
  line-height: 1.7;
  margin-bottom: 10px;
}

.modal-body ul {
  list-style: none;
  margin-bottom: 12px;
}

.modal-body ul li {
  font-size: 0.85rem;
  color: var(--mc-subtle);
  line-height: 1.7;
  padding-left: 18px;
  position: relative;
}

.modal-body ul li::before {
  content: "\2022";
  position: absolute;
  left: 0;
  color: var(--mc-accent);
  font-weight: 700;
}

/* ===========================================================
   Cube Page (individual topic pages)
   =========================================================== */
.cube-page-header {
  text-align: center;
  padding: 32px 0 16px;
}

.cube-page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--mc-text);
  margin-bottom: 6px;
}

.cube-page-desc {
  font-size: 0.9rem;
  color: var(--mc-subtle);
  max-width: 500px;
  margin: 0 auto;
}

.cube-page-frame {
  position: relative;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding-top: 75%; /* 4:3 for cube display */
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--mc-card-border);
  background: var(--mc-face-bg);
  box-shadow: 0 4px 24px var(--mc-glow);
}

.cube-page-frame iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.cube-page-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--mc-btn-text);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--mc-toolbar-border);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.cube-page-back:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--mc-text-hover);
}

/* ===========================================================
   Responsive Breakpoints
   =========================================================== */

/* 480px+ — Small phones landscape / larger phones */
@media (min-width: 480px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-title {
    font-size: 2.4rem;
  }

  .section-title {
    font-size: 1.7rem;
  }
}

/* 768px+ — Tablets */
@media (min-width: 768px) {
  .container {
    padding: 0 24px;
  }

  .section {
    padding: 64px 0;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .hero-description {
    font-size: 1.05rem;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

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

  .section-title {
    font-size: 1.9rem;
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* 1024px+ — Small desktops */
@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }

  .nav-hamburger {
    display: none;
  }

  .hero-title {
    font-size: 3.2rem;
  }

  .card-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .section-title {
    font-size: 2rem;
  }
}

/* 1280px+ — Large desktops */
@media (min-width: 1280px) {
  .container {
    padding: 0 32px;
  }

  .hero {
    padding: 80px 0 64px;
  }

  .hero-title {
    font-size: 3.5rem;
  }
}


    /* ── Features table ── */
    .features-table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      margin: 0 auto;
      max-width: 900px;
    }
    .features-table {
      width: 100%;
      border-collapse: collapse;
    }
    .features-table thead th {
      font-size: 0.75rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--mc-accent);
      padding: 10px 16px;
      text-align: left;
      border-bottom: 2px solid var(--mc-glow-border);
    }
    .features-table tbody th {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--mc-text);
      padding: 12px 16px;
      text-align: left;
      white-space: nowrap;
      vertical-align: top;
    }
    .features-table tbody td {
      font-size: 0.85rem;
      color: var(--mc-subtle);
      padding: 12px 16px;
      text-align: left;
      line-height: 1.6;
    }
    .features-table tbody tr {
      border-bottom: 1px solid var(--mc-divider);
    }
    .features-table tbody tr:last-child {
      border-bottom: none;
    }

    /* ── Shop hero ── */
    .shop-hero {
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
    }
    .shop-hero__image {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--mc-card-border);
      box-shadow: 0 8px 32px var(--mc-glow);
      margin-bottom: 28px;
    }
    .shop-hero__image img {
      width: 100%;
      height: auto;
      display: block;
    }
    .shop-hero__buttons {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }

    /* ── Product cards ── */
    .buyapp-card {
      background: var(--mc-card-bg);
      border: 1px solid var(--mc-card-border);
      border-radius: 12px;
      overflow: hidden;
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .buyapp-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 24px var(--mc-glow);
      border-color: var(--mc-glow-border);
    }
    .buyapp-card__image {
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: var(--mc-face-bg);
    }
    .buyapp-card__image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .buyapp-card__body {
      padding: 16px 18px;
    }
    .buyapp-card__title {
      font-size: 1rem;
      font-weight: 600;
      color: var(--mc-text);
      margin-bottom: 6px;
    }
    .buyapp-card__desc {
      font-size: 0.85rem;
      color: var(--mc-subtle);
      line-height: 1.6;
      margin-bottom: 14px;
    }
    .buyapp-card__btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--mc-accent-text);
      background: var(--mc-accent);
      border-radius: 8px;
      text-decoration: none;
      transition: transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 4px 16px var(--mc-glow);
    }
    .buyapp-card__btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 24px var(--mc-glow);
      color: var(--mc-accent-text);
    }