/* ========================================
   千本格子なかも - Teaser Site
   Color Palette:
     Black      #0a0a0a  (background)
     Silver     #e8e8e8  (text)
     Neon Green #00ff41  (glitch / accent)
     Beige      #c8b89a  (sub-text)
     Gold       #d4a843  (decorative)
   ======================================== */

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

:root {
  --black: #0a0a0a;
  --silver: #e8e8e8;
  --green: #00ff41;
  --beige: #c8b89a;
  --gold: #d4a843;
  --green-dim: rgba(0, 255, 65, 0.15);
  --green-glow: rgba(0, 255, 65, 0.4);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--black);
  color: var(--silver);
  font-family: "Courier New", "SF Mono", "Consolas", monospace;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

.concept,
.coming-soon,
footer {
  content-visibility: auto;
  contain-intrinsic-size: 320px;
}

/* ---- scanline overlay ---- */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
}

.perf-lite .scanlines,
.perf-lite .glitch-border,
.perf-lite .glitch-text::before,
.perf-lite .glitch-text::after {
  display: none;
}

/* ---- main layout ---- */
main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4rem;
  padding: 3rem 1.5rem 2rem;
  max-width: 720px;
  margin: 0 auto;
}

/* ---- hero section ---- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding-top: 2rem;
}

.character-container {
  position: relative;
  width: min(700px, 92vw);
}

.character-img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(0.1) contrast(1.05);
  transition: filter 0.3s ease;
}

.perf-lite .character-img {
  transition: none;
  filter: grayscale(0.04) contrast(1.02);
}

.character-img:hover {
  filter: grayscale(0) contrast(1.1) brightness(1.05);
}

/* green glitch border around character */
.glitch-border {
  position: absolute;
  inset: -4px;
  border: 1px solid var(--green-dim);
  pointer-events: none;
  animation: borderGlitch 4s infinite;
}

@keyframes borderGlitch {
  0%, 92%, 100% {
    border-color: var(--green-dim);
    transform: translate(0, 0);
  }
  93% {
    border-color: var(--green);
    transform: translate(2px, -1px);
  }
  94% {
    border-color: var(--green-dim);
    transform: translate(-1px, 1px);
  }
  95% {
    border-color: var(--green);
    transform: translate(1px, 0);
  }
  96% {
    transform: translate(0, 0);
  }
}

/* ---- hero text ---- */
.hero-text {
  text-align: center;
}

/* glitch text effect */
.glitch-text {
  font-size: clamp(1.8rem, 6vw, 2.8rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--silver);
  position: relative;
  display: inline-block;
}

.glitch-text::before,
.glitch-text::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.glitch-text::before {
  color: var(--green);
  animation: glitch1 3s infinite;
  clip-path: inset(0 0 65% 0);
}

.glitch-text::after {
  color: var(--gold);
  animation: glitch2 3s infinite;
  clip-path: inset(65% 0 0 0);
}

@keyframes glitch1 {
  0%, 89%, 100% { transform: translate(0); opacity: 0; }
  90% { transform: translate(-3px, -1px); opacity: 0.8; }
  91% { transform: translate(2px, 1px); opacity: 0.6; }
  92% { transform: translate(0); opacity: 0; }
}

@keyframes glitch2 {
  0%, 93%, 100% { transform: translate(0); opacity: 0; }
  94% { transform: translate(3px, 1px); opacity: 0.7; }
  95% { transform: translate(-2px, -1px); opacity: 0.5; }
  96% { transform: translate(0); opacity: 0; }
}

.subtitle {
  font-size: clamp(0.7rem, 2.5vw, 0.9rem);
  letter-spacing: 0.5em;
  color: var(--beige);
  margin-top: 0.5rem;
  opacity: 0.7;
}

/* ---- concept section ---- */
.concept {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.tagline {
  font-size: clamp(1rem, 3.5vw, 1.4rem);
  color: var(--silver);
  letter-spacing: 0.1em;
  font-weight: 400;
}

.divider {
  width: 60px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--green),
    transparent
  );
}

.description {
  font-size: clamp(0.8rem, 2.5vw, 0.95rem);
  line-height: 2;
  color: var(--beige);
  opacity: 0.8;
}

.accent {
  color: var(--green);
  opacity: 0.5;
  font-size: 0.7em;
  letter-spacing: -0.1em;
}

/* ---- coming soon ---- */
.coming-soon {
  text-align: center;
  padding: 2rem 0;
}

.status {
  font-size: 0.8rem;
  color: var(--green);
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
  opacity: 0.7;
}

.blink {
  animation: cursorBlink 1s step-end infinite;
}

@keyframes cursorBlink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.dots {
  animation: dotsAnim 2s steps(3) infinite;
  display: inline-block;
  width: 2em;
  text-align: left;
  overflow: hidden;
  vertical-align: bottom;
}

@keyframes dotsAnim {
  0% { width: 0; }
  100% { width: 2em; }
}

.soon-text {
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  letter-spacing: 0.4em;
  color: var(--silver);
  opacity: 0.3;
  font-weight: 300;
}

/* X link (hidden until account exists) */
.x-link {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.6rem 2rem;
  border: 1px solid var(--green);
  color: var(--green);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  transition: all 0.3s ease;
}

.x-link:hover {
  background: var(--green-dim);
  box-shadow: 0 0 20px var(--green-glow);
}

/* ---- footer ---- */
footer {
  text-align: center;
  padding: 2rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-text {
  font-size: 0.7rem;
  color: var(--beige);
  opacity: 0.4;
  letter-spacing: 0.2em;
}

.gold {
  color: var(--gold);
}

/* ---- responsive ---- */
@media (min-width: 640px) {
  main {
    padding-top: 6rem;
    gap: 5rem;
  }

  .hero {
    gap: 2.5rem;
    padding-top: 3rem;
  }

  .character-container {
    width: min(700px, 90vw);
  }

  .description {
    max-width: 400px;
  }
}

/* ---- reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .glitch-text::before,
  .glitch-text::after,
  .glitch-border,
  .blink,
  .dots {
    animation: none;
  }
}