/* ============================================================
   EIA 会員サイト Phase 1 - スタイル (vanilla CSS、Open Design output で置換可)
   ============================================================ */

:root {
  --color-bg: #fafafa;
  --color-text: #1a1a1a;
  --color-text-sub: #666;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-error: #dc2626;
  --color-border: #e5e5e5;
  --color-card: #ffffff;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,0.04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
               "Noto Sans JP", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

/* ===== brand ===== */
.brand {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  margin: 0;
  color: var(--color-accent);
}
.brand-sub {
  font-size: 0.85rem;
  color: var(--color-text-sub);
  margin: 0 0 2rem 0;
}

/* ===== auth (login + onboarding) ===== */
.auth-container {
  max-width: 420px;
  margin: 4rem auto 2rem;
  padding: 2rem;
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}
.auth-container h2 {
  font-size: 1.4rem;
  margin: 1rem 0 0.5rem;
}
.auth-container .hint {
  color: var(--color-text-sub);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}
.auth-step form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.auth-step input {
  padding: 0.85rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  text-align: center;
}
.auth-step input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-color: var(--color-accent);
}
.auth-step button[type="submit"] {
  padding: 0.85rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.auth-step button[type="submit"]:hover:not(:disabled) {
  background: var(--color-accent-hover);
}
.auth-step button[type="submit"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.link-button {
  background: none;
  border: none;
  color: var(--color-accent);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0.5rem;
  margin-top: 1rem;
  text-decoration: underline;
}
.link-button:hover { color: var(--color-accent-hover); }

.status-message {
  font-size: 0.9rem;
  color: var(--color-text-sub);
  margin: 1rem 0 0;
}
.status-message.error { color: var(--color-error); }

/* ===== onboarding mode cards ===== */
.onboarding .mode-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-top: 1rem;
}
.mode-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 1.25rem;
  background: #fff;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, transform 0.1s;
}
.mode-card:hover:not(:disabled) {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}
.mode-card:disabled { opacity: 0.5; cursor: not-allowed; }
.mode-emoji { font-size: 2rem; }
.mode-label { font-size: 1.1rem; font-weight: 600; }
.mode-desc { font-size: 0.85rem; color: var(--color-text-sub); }

/* ===== home ===== */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}
.site-header .brand { font-size: 1.6rem; }
.site-header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.member-label {
  font-size: 0.85rem;
  color: var(--color-text-sub);
}

.home-container {
  max-width: 880px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}
.welcome h2 {
  font-size: 1.8rem;
  margin: 0 0 0.5rem;
}
.days-info {
  color: var(--color-text-sub);
  font-size: 0.95rem;
  margin: 0 0 2rem;
}

.features h3 {
  font-size: 1.2rem;
  margin: 2rem 0 1rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.feature-card {
  padding: 1.25rem;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  position: relative;
}
.feature-card.status-disabled,
.feature-card.status-hidden {
  opacity: 0.6;
}
.feature-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.feature-desc {
  font-size: 0.9rem;
  color: var(--color-text-sub);
  margin-bottom: 0.75rem;
}
.feature-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: #f3f4f6;
  color: var(--color-text-sub);
}
.feature-card.status-available .feature-badge {
  background: #d1fae5;
  color: #065f46;
}

/* ===== mobile ===== */
@media (max-width: 600px) {
  .auth-container { margin: 1.5rem 1rem; padding: 1.5rem; }
  .site-header { padding: 1rem; flex-direction: column; gap: 0.5rem; }
  .home-container { padding: 0 1rem; }
}