/* Metsuke Landing Page — Edo Inspector × Cybersecurity */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@300;400;600&family=Zen+Kaku+Gothic+New:wght@300;400;500;700&display=swap');

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

:root {
  --landing-font-display: "Cormorant Garamond", "Zen Kaku Gothic New", serif;
  --landing-font-body: "Zen Kaku Gothic New", var(--font-display);
}

body {
  font-family: var(--landing-font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ===== Layout ===== */
.landing {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.landing__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 380px;
  padding: 1rem;
  animation: landing-fadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ===== Atmosphere ===== */
.landing__atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Asanoha-inspired geometric grid */
.landing__grid-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      var(--text-secondary) 59px,
      var(--text-secondary) 60px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 59px,
      var(--text-secondary) 59px,
      var(--text-secondary) 60px
    );
  animation: landing-gridPulse 8s ease-in-out infinite;
}

/* Ink-wash radial fog */
.landing__ink-wash {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 50% 45%, var(--accent-indigo-dim) 0%, transparent 70%),
    radial-gradient(ellipse 300px 300px at 30% 60%, var(--accent-purple-dim) 0%, transparent 60%),
    radial-gradient(ellipse 200px 200px at 70% 30%, var(--accent-gold-dim) 0%, transparent 50%);
  animation: landing-inkBreath 12s ease-in-out infinite alternate;
}

/* Horizontal scan line */
.landing__scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent-indigo) 20%,
    var(--accent-indigo) 80%,
    transparent 100%
  );
  opacity: 0.15;
  animation: landing-scanMove 6s linear infinite;
}

/* ===== Eye Motif ===== */
.landing__eye-motif {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 2rem;
}

.landing__eye-svg {
  width: 120px;
  height: 120px;
  filter: drop-shadow(0 0 30px var(--accent-indigo-dim));
}

.landing__eye-ring {
  stroke: var(--accent-indigo);
  fill: none;
  opacity: 0.3;
}
.landing__eye-ring--outer {
  stroke-dasharray: 4 8;
  animation: landing-ringRotate 30s linear infinite;
  transform-origin: 60px 60px;
}
.landing__eye-ring--inner {
  stroke-dasharray: 2 6;
  animation: landing-ringRotate 20s linear infinite reverse;
  transform-origin: 60px 60px;
}

.landing__kanji {
  font-family: var(--landing-font-display);
  font-size: 0.875rem;
  font-weight: 300;
  letter-spacing: 0.5em;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  text-indent: 0.5em;
  opacity: 0.7;
}

/* ===== Sign-in Card ===== */
.landing__card {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  animation: landing-cardReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

/* Subtle top accent line */
.landing__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent-indigo) 30%,
    var(--accent-purple) 70%,
    transparent 100%
  );
  opacity: 0.6;
}

.landing__title {
  font-family: var(--landing-font-display);
  font-size: 1.625rem;
  font-weight: 300;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 0.25rem;
}

.landing__subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  font-weight: 300;
}

/* GitHub sign-in button */
.landing__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  color: var(--text-primary);
  text-decoration: none;
  font-family: var(--landing-font-body);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.landing__btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-indigo-dim) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.landing__btn:hover {
  border-color: var(--accent-indigo);
  box-shadow: 0 0 20px var(--accent-indigo-dim), inset 0 0 20px var(--accent-indigo-dim);
  transform: translateY(-1px);
}
.landing__btn:hover::after {
  opacity: 1;
}

.landing__btn:active {
  transform: translateY(0);
}

.landing__btn:focus-visible {
  outline: 2px solid var(--accent-indigo);
  outline-offset: 2px;
}

.landing__btn-icon {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

/* ===== Description Row ===== */
.landing__description-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  animation: landing-cardReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.5s both;
}

.landing__divider {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.landing__description {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.8;
  text-align: center;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ===== Feature Pills ===== */
.landing__features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
  animation: landing-cardReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.6s both;
}

.landing__pill {
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  letter-spacing: 0.04em;
  transition: all 0.3s ease;
}

.landing__pill:hover {
  color: var(--accent-indigo);
  border-color: var(--accent-indigo-border);
  background: var(--accent-indigo-dim);
}

/* ===== Footer ===== */
.landing__footer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  animation: landing-cardReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.7s both;
}

.landing__footer-link {
  font-size: 0.75rem;
  color: var(--accent-indigo);
  text-decoration: none;
  transition: color 0.2s ease;
}
.landing__footer-link:hover {
  text-decoration: underline;
}

.landing__footer-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-secondary);
  opacity: 0.5;
}

.landing__footer-text {
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

/* ===== Animations ===== */
@keyframes landing-fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes landing-cardReveal {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes landing-gridPulse {
  0%, 100% { opacity: 0.04; }
  50% { opacity: 0.07; }
}

@keyframes landing-inkBreath {
  0% { opacity: 0.8; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.05); }
}

@keyframes landing-scanMove {
  0% { top: -2%; }
  100% { top: 102%; }
}

@keyframes landing-ringRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .landing__content {
    max-width: 100%;
    padding: 1rem;
  }
  .landing__card {
    padding: 1.5rem 1.25rem;
  }
  .landing__btn {
    min-height: 48px;
    font-size: 1rem;
  }
  .landing__title {
    font-size: 1.375rem;
  }
  .landing__description {
    white-space: normal;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  .landing__scan-line,
  .landing__grid-pattern,
  .landing__ink-wash,
  .landing__eye-ring--outer,
  .landing__eye-ring--inner {
    animation: none;
  }
  .landing__content,
  .landing__card,
  .landing__description-row,
  .landing__features,
  .landing__footer {
    animation: none;
    opacity: 1;
  }
}