/* ================================================================
 *  BANDAIT LANDING — OLED NOIR & NEON DESIGN SYSTEM
 *  Service Manual Entry: CSS-LAND-001
 *  Aesthetic: Stage-Ready. No pixels wasted.
 * ================================================================ */

/* --- RESET & BASE --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Stage Palette */
  --black: #000000;
  --off-white: #F0F0F0;
  --disabled-grey: #333333;
  --surface: #0A0A0A;
  --surface-hover: #141414;

  /* Neon High-Vis */
  --cyan: #00FFFF;
  --lime: #CCFF00;
  --magenta: #FF00FF;
  --orange: #FF4400;
  --red: #FF0000;

  /* Glow presets */
  --glow-cyan: 0 0 20px rgba(0, 255, 255, 0.3), 0 0 60px rgba(0, 255, 255, 0.1);
  --glow-lime: 0 0 20px rgba(204, 255, 0, 0.3), 0 0 60px rgba(204, 255, 0, 0.1);
  --glow-magenta: 0 0 20px rgba(255, 0, 255, 0.3), 0 0 60px rgba(255, 0, 255, 0.1);

  /* Typography */
  --font-body: 'Inter', 'Roboto', sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', monospace;

  /* Spacing */
  --section-pad: clamp(3rem, 8vh, 6rem) clamp(1rem, 5vw, 4rem);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--black);
  color: var(--off-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--lime);
}

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

/* --- UTILITY --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

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

/* --- HEADER / NAV --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem clamp(1rem, 5vw, 4rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--disabled-grey);
  transition: background 0.3s;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--off-white);
  text-transform: uppercase;
}
.logo span {
  color: var(--cyan);
  text-shadow: var(--glow-cyan);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #888;
  transition: color 0.2s, text-shadow 0.2s;
}
.nav-links a:hover {
  color: var(--cyan);
  text-shadow: 0 0 8px rgba(0, 255, 255, 0.4);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--disabled-grey);
  border-radius: 4px;
  padding: 0.5rem;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--off-white);
  transition: transform 0.3s, opacity 0.3s;
}

/* --- HERO SECTION --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--section-pad);
  padding-top: 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 255, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.15); }
}

.hero-content {
  text-align: center;
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
  border: 1px solid var(--lime);
  padding: 0.35rem 1rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  text-shadow: 0 0 8px rgba(204, 255, 0, 0.3);
}

.hero h1 {
  font-family: var(--font-body);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}
.hero h1 .neon {
  color: var(--cyan);
  text-shadow: var(--glow-cyan);
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: #999;
  margin-bottom: 2.5rem;
  font-weight: 400;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- BUTTONS (MIDI PAD STYLE) --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.9rem 1.8rem;
  border-radius: 4px;
  border: 2px solid;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-cyan {
  color: var(--cyan);
  border-color: var(--cyan);
  background: transparent;
}
.btn-cyan:hover {
  color: var(--black);
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.btn-lime {
  color: var(--lime);
  border-color: var(--lime);
  background: transparent;
}
.btn-lime:hover {
  color: var(--black);
  background: var(--lime);
  box-shadow: var(--glow-lime);
}

.btn-magenta {
  color: var(--magenta);
  border-color: var(--magenta);
  background: transparent;
}
.btn-magenta:hover {
  color: var(--black);
  background: var(--magenta);
  box-shadow: var(--glow-magenta);
}

.btn-filled {
  color: var(--black);
  background: var(--cyan);
  border-color: var(--cyan);
}
.btn-filled:hover {
  background: var(--off-white);
  border-color: var(--off-white);
  box-shadow: 0 0 20px rgba(240, 240, 240, 0.2);
}

.btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* --- SECTION COMMON --- */
.section {
  padding: var(--section-pad);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--magenta);
  margin-bottom: 0.75rem;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.15;
}

.section-subtitle {
  font-size: 1.05rem;
  color: #888;
  max-width: 600px;
  margin-bottom: 3rem;
}

/* --- FEATURES --- */
.features {
  border-top: 1px solid var(--disabled-grey);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--disabled-grey);
  border-radius: 4px;
  padding: 2rem;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.feature-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 255, 255, 0.08);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.feature-card h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  color: var(--off-white);
}

.feature-card p {
  font-size: 0.9rem;
  color: #999;
  line-height: 1.6;
}

/* Accent borders per card */
.feature-card[data-accent="cyan"]  { border-top: 2px solid var(--cyan); }
.feature-card[data-accent="lime"]  { border-top: 2px solid var(--lime); }
.feature-card[data-accent="magenta"] { border-top: 2px solid var(--magenta); }
.feature-card[data-accent="orange"] { border-top: 2px solid var(--orange); }

/* --- HOW IT WORKS --- */
.how-it-works {
  border-top: 1px solid var(--disabled-grey);
}

.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.flow-node {
  background: var(--surface);
  border: 2px solid var(--disabled-grey);
  border-radius: 4px;
  padding: 1.5rem 2rem;
  text-align: center;
  min-width: 180px;
  transition: border-color 0.3s;
}
.flow-node.leader {
  border-color: var(--cyan);
  box-shadow: inset 0 0 15px rgba(0, 255, 255, 0.05);
}
.flow-node.follower {
  border-color: var(--lime);
}

.flow-node-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.flow-node h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.flow-node p {
  font-size: 0.8rem;
  color: #888;
}

.flow-arrow {
  font-size: 1.5rem;
  color: var(--cyan);
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
  animation: arrow-pulse 2s ease-in-out infinite;
}

@keyframes arrow-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* --- TECH SPECS --- */
.tech-specs {
  border-top: 1px solid var(--disabled-grey);
}

.specs-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.spec-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--surface);
  border-left: 2px solid var(--disabled-grey);
  border-radius: 0 4px 4px 0;
  transition: border-color 0.3s;
}
.spec-item:hover {
  border-left-color: var(--cyan);
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #666;
  display: block;
  margin-bottom: 0.2rem;
}

.spec-value {
  font-size: 0.95rem;
  font-weight: 500;
}

/* --- DOWNLOAD SECTION --- */
.download {
  border-top: 1px solid var(--disabled-grey);
  text-align: center;
}

.download-cards {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.download-card {
  background: var(--surface);
  border: 2px solid var(--disabled-grey);
  border-radius: 4px;
  padding: 2.5rem 3rem;
  text-align: center;
  min-width: 240px;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.download-card:hover {
  transform: translateY(-4px);
}

.download-card.android {
  border-color: var(--lime);
}
.download-card.android:hover {
  box-shadow: var(--glow-lime);
}

.download-card.windows {
  border-color: var(--cyan);
}
.download-card.windows:hover {
  box-shadow: var(--glow-cyan);
}

.download-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.download-card h3 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.download-card .version {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #666;
  margin-bottom: 1.5rem;
  display: block;
}

/* --- FOOTER --- */
.site-footer {
  border-top: 1px solid var(--disabled-grey);
  padding: 2rem clamp(1rem, 5vw, 4rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #666;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #666;
}
.footer-links a:hover {
  color: var(--cyan);
}

/* --- REVEAL ANIMATIONS --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- BEAT BORDER EFFECT --- */
.beat-border {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--cyan);
  opacity: 0;
  z-index: 200;
  pointer-events: none;
  transition: opacity 0.05s;
}
.beat-border.flash {
  opacity: 1;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 99;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    font-size: 1.2rem;
  }

  .nav-toggle {
    display: flex;
    z-index: 101;
  }

  .flow-diagram {
    flex-direction: column;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

  .hero h1 {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-ctas {
    flex-direction: column;
    align-items: center;
  }

  .download-cards {
    flex-direction: column;
    align-items: center;
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
  }
}