/* ============================================================
   Janus Browser Landing — Design Tokens & Styles
   Matches tokens.css from src/renderer/src/styles/tokens.css
   Extended with landing-specific tokens for visual richness.
   ============================================================ */

/* ── Design Tokens ────────────────────────────────────────── */

:root {
  /* Core (matches tokens.css) */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f5f5f5;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #666666;
  --color-border: #e5e5e5;
  --color-status-green: #22c55e;
  --color-status-blue: #3b82f6;
  --color-status-yellow: #f59e0b;
  --color-status-red: #ef4444;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Landing extensions */
  --color-accent: var(--color-status-blue);
  --color-accent-hover: #2563eb;
  --color-accent-muted: rgba(59, 130, 246, 0.12);
  --color-accent-glow: rgba(59, 130, 246, 0.25);
  --color-bg-tertiary: #fafafa;
  --color-bg-inverse: #1a1a2e;
  --color-text-inverse: #e4e4e4;
  --color-text-muted: #999999;
  --color-card-border: rgba(0, 0, 0, 0.06);
  --color-card-bg: #ffffff;
  --color-nav-bg: rgba(255, 255, 255, 0.72);
  --color-bg-translucent-primary: rgba(255, 255, 255, 0.75);
  --color-bg-translucent-secondary: rgba(245, 245, 247, 0.78);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04), 0 8px 32px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.06), 0 16px 48px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 60px var(--color-accent-glow);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Typography scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;

  /* Layout */
  --nav-height: 64px;
  --content-max: 1200px;
  --content-narrow: 800px;
}

/* ── Dark Mode ────────────────────────────────────────────── */

/* System preference */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #1a1a2e;
    --color-bg-secondary: #16213e;
    --color-text-primary: #e4e4e4;
    --color-text-secondary: #a0a0a0;
    --color-border: #2a2a4a;
    --color-bg-tertiary: #111827;
    --color-text-muted: #6b7280;
    --color-card-border: rgba(255, 255, 255, 0.06);
    --color-card-bg: #1e293b;
    --color-nav-bg: rgba(26, 26, 46, 0.72);
    --color-bg-translucent-primary: rgba(26, 26, 46, 0.75);
    --color-bg-translucent-secondary: rgba(22, 33, 62, 0.78);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3), 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.4), 0 16px 48px rgba(0, 0, 0, 0.3);
  }
}

/* Explicit override via attribute (takes precedence) */
[data-theme='dark'] {
  --color-bg-primary: #1a1a2e;
  --color-bg-secondary: #16213e;
  --color-text-primary: #e4e4e4;
  --color-text-secondary: #a0a0a0;
  --color-border: #2a2a4a;
  --color-bg-tertiary: #111827;
  --color-text-muted: #6b7280;
  --color-card-border: rgba(255, 255, 255, 0.06);
  --color-card-bg: #1e293b;
  --color-nav-bg: rgba(26, 26, 46, 0.72);
  --color-bg-translucent-primary: rgba(26, 26, 46, 0.75);
  --color-bg-translucent-secondary: rgba(22, 33, 62, 0.78);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3), 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.4), 0 16px 48px rgba(0, 0, 0, 0.3);
}

/* ── Reset ────────────────────────────────────────────────── */

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  background-image:
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--color-accent-muted), transparent 70%),
    radial-gradient(ellipse 50% 50% at 80% 80%, var(--color-accent-glow), transparent 70%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

/* ── Focus ────────────────────────────────────────────────── */

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Reduced Motion ───────────────────────────────────────── */

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


/* ============================================================
   COMPONENTS
   ============================================================ */

/* ── Navigation ───────────────────────────────────────────── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

@supports not (backdrop-filter: blur(12px)) {
  .nav {
    background: var(--color-bg-primary);
  }
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.nav-logo-icon {
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-left: auto;
  margin-right: var(--space-lg);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

.nav-link-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 16px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-full);
  color: var(--color-accent) !important;
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease !important;
}

.nav-link-accent:hover {
  background: var(--color-accent);
  color: #fff !important;
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Buttons ──────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-ghost {
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-secondary);
}

.btn-lg {
  padding: 14px 36px;
  font-size: var(--text-base);
}

/* ── Section Headers ──────────────────────────────────────── */

.section-header {
  text-align: center;
  max-width: var(--content-narrow);
  margin: 0 auto var(--space-3xl);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--color-text-primary);
}

.section-desc {
  margin-top: var(--space-md);
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.6;
}


/* ============================================================
   SECTIONS
   ============================================================ */

/* ── Hero ─────────────────────────────────────────────────── */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-lg) var(--space-4xl);
  overflow: hidden;
  background: transparent;
}

.hero-bg {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: var(--content-narrow);
}

.hero-badge {
  display: inline-block;
  padding: 4px 14px;
  margin-bottom: var(--space-lg);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-muted);
  border-radius: var(--radius-full);
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.hero-title-line {
  font-size: var(--text-6xl);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--color-text-primary);
}

.hero-title-sub {
  font-size: var(--text-3xl);
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-text-secondary);
  letter-spacing: -0.02em;
}

.hero-desc {
  margin: var(--space-xl) auto 0;
  max-width: 560px;
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}

/* Hero visual decoration */
.hero-visual {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  top: 30%;
  left: 50%;
  width: 400px;
  height: 400px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-glow), transparent 70%);
  opacity: 0.4;
  animation: orb-pulse 6s ease-in-out infinite alternate;
}

.hero-orb-ring {
  position: absolute;
  top: 30%;
  left: 50%;
  width: 500px;
  height: 500px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid var(--color-accent-muted);
  opacity: 0.3;
  animation: orb-pulse 6s ease-in-out infinite alternate-reverse;
}

.hero-grid-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--color-accent-muted) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, black 30%, transparent 70%);
}

@keyframes orb-pulse {
  0%   { transform: translate(-50%, -50%) scale(0.9); opacity: 0.3; }
  100% { transform: translate(-50%, -50%) scale(1.05); opacity: 0.45; }
}

/* ── Features ─────────────────────────────────────────────── */

.features {
  padding: var(--space-4xl) var(--space-lg);
  background: transparent;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  max-width: var(--content-max);
  margin: 0 auto;
}

.feature-card {
  position: relative;
  padding: var(--space-xl);
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

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

.feature-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-lg);
  color: var(--color-accent);
  background: var(--color-accent-muted);
  border-radius: var(--radius-md);
}

.feature-card-title {
  margin-bottom: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.feature-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ── Tech Stack ───────────────────────────────────────────── */

.tech {
  padding: var(--space-4xl) var(--space-lg);
  background: var(--color-bg-primary);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  max-width: var(--content-max);
  margin: 0 auto;
}

.tech-tag {
  padding: 6px 16px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-muted);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
  transition: background 0.2s ease, transform 0.2s ease;
}

.tech-tag:hover {
  background: var(--color-accent);
  color: #fff;
  transform: translateY(-2px);
}

/* ── CTA ──────────────────────────────────────────────────── */

.cta {
  padding: var(--space-4xl) var(--space-lg);
  background: transparent;
  text-align: center;
}

.cta-content {
  max-width: var(--content-narrow);
  margin: 0 auto;
}

.cta-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--color-text-primary);
}

.cta-desc {
  margin-top: var(--space-md);
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}

/* ── Footer ───────────────────────────────────────────────── */

.footer {
  padding: var(--space-3xl) var(--space-lg) var(--space-xl);
  background: transparent;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3xl);
  max-width: var(--content-max);
  margin: 0 auto;
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  max-width: 240px;
}

.footer-name {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.footer-links {
  display: flex;
  gap: var(--space-3xl);
}

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

.footer-col-title {
  margin-bottom: var(--space-xs);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  max-width: var(--content-max);
  margin: var(--space-xl) auto 0;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}


/* ============================================================
   REVEAL ANIMATIONS (CSS side — triggered by JS via .visible)
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }


/* ============================================================
   RESPONSIVE: Tablet (≤ 779px)
   ============================================================ */

@media (max-width: 779px) {
  :root {
    --text-5xl: 2.75rem;
    --text-6xl: 3.25rem;
    --text-3xl: 1.5rem;
    --text-4xl: 2rem;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 !important;
    margin: 0 !important;
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-110%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-links a {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-base);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
    width: 100%;
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .nav-links .nav-link-accent {
    border: none !important;
    border-radius: 0 !important;
    color: var(--color-accent) !important;
    background: transparent !important;
    height: auto !important;
    padding: var(--space-md) var(--space-lg) !important;
  }

  .nav-toggle {
    display: flex;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: var(--space-2xl);
  }

  .footer-links {
    gap: var(--space-2xl);
  }
}


/* ============================================================
   RESPONSIVE: Mobile (≤ 539px)
   ============================================================ */

@media (max-width: 539px) {
  :root {
    --text-5xl: 2rem;
    --text-6xl: 2.5rem;
    --text-3xl: 1.25rem;
    --text-4xl: 1.75rem;
    --nav-height: 56px;
  }

  .hero {
    padding-top: calc(var(--nav-height) + var(--space-3xl));
    padding-bottom: var(--space-3xl);
  }

  .hero-desc {
    font-size: var(--text-base);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .tech-tags {
    gap: 6px;
  }

  .tech-tag {
    padding: 5px 12px;
    font-size: 0.7rem;
  }
}

/* ============================================================
   CyberDream Motion Laboratory Integrations
   ============================================================ */

#hero-particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.52; /* Reduced by 30% for subtler contrast */
}

.hero-content {
  z-index: 2; /* Ensure it is above the canvas */
}

/* 3D Tilt Card Support */
.feature-card {
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, border-color 0.3s ease !important;
  transform-style: preserve-3d;
  transform: perspective(1000px);
}

.feature-card-icon, .feature-card-title, .feature-card-desc {
  transform: translateZ(25px);
}

/* Typed Cursor Styling */
.typed-cursor {
  color: var(--color-accent);
  opacity: 1;
  animation: blink 0.7s infinite;
  margin-left: 2px;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Magnetic Button Transition Adjust */
.btn-primary.magnetic {
  transition: transform 0.2s cubic-bezier(0.25, 1, 0.5, 1), box-shadow 0.2s ease, background 0.2s ease;
}

/* Navbar Action Buttons (Theme & Language Toggles) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 0;
  margin-right: 0;
}

.nav-action-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  height: 34px;
  padding: 0 14px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  font-family: inherit;
}

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

/* Force theme-toggle to be a perfect circle */
#theme-toggle.nav-action-btn {
  width: 34px;
  padding: 0;
  justify-content: center;
}

/* Adjust mobile responsive navbar layouts */
@media (max-width: 779px) {
  .nav-links {
    gap: 0 !important;
    padding: 0 !important;
  }
  .nav-actions {
    margin-right: var(--space-md);
  }
  .nav-action-btn span {
    display: none; /* Hide label text on mobile to save space */
  }
  .nav-action-btn {
    padding: 8px;
    width: 36px;
    height: 36px;
    justify-content: center;
    border-radius: 50%; /* Rounded buttons for clean mobile appearance */
  }
}