/* ========================================
   COMPONENTS.CSS — Reusable UI Components
   CMUS++ Website
   ======================================== */

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  height: 58px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav__logo {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav__logo span {
  opacity: 0.4;
}

.nav__links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav__links a {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  transition: color var(--transition);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0; right: 0;
  height: 2px;
  background: var(--fg);
  transform: scaleX(0);
  transition: transform 0.2s ease;
  transform-origin: left;
}

.nav__links a:hover { color: var(--fg); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__links a.active { color: var(--fg); }
.nav__links a.active::after { transform: scaleX(1); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 36px; height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg);
  transition: all var(--transition);
  font-size: 0.9rem;
}

.theme-toggle:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  border: 2px solid transparent;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.btn-primary:hover {
  background: transparent;
  color: var(--fg);
}

.btn-outline {
  background: transparent;
  color: var(--fg);
  border-color: var(--fg);
}
.btn-outline:hover {
  background: var(--fg);
  color: var(--bg);
}

.btn-ghost {
  background: transparent;
  color: var(--fg-muted);
  border-color: var(--border);
}
.btn-ghost:hover {
  color: var(--fg);
  border-color: var(--fg);
}

.btn-sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
}

/* ---- Tag / Badge ---- */
.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--tag-bg);
  color: var(--tag-fg);
  border-radius: 2px;
}

.badge-outline {
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border);
}

/* ---- Terminal Block ---- */
.terminal {
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 8px;
  overflow: hidden;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
  box-shadow: var(--shadow);
}

.terminal__bar {
  background: #2a2a2a;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.terminal__dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}

.terminal__dot:nth-child(1) { background: #ff5f57; }
.terminal__dot:nth-child(2) { background: #febc2e; }
.terminal__dot:nth-child(3) { background: #28c840; }

.terminal__title {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: #666;
  font-family: 'IBM Plex Mono', monospace;
}

.terminal__body {
  padding: 1.25rem 1.5rem;
}

.terminal__line {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.terminal__prompt { color: #666; user-select: none; }
.terminal__cmd { color: #e8e8e8; }
.terminal__comment { color: #555; font-style: italic; }

.terminal__line.success .terminal__cmd { color: #28c840; }
.terminal__line.info .terminal__cmd    { color: #7ec8e3; }

/* Copy button on terminal */
.terminal-wrap { position: relative; }
.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.8rem;
  background: transparent;
  border: 1px solid #444;
  color: #888;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s;
}
.copy-btn:hover { color: #e8e8e8; border-color: #888; }

/* ---- Feature Card ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--fg);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.card__icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  display: block;
}

.card__title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ---- Key Shortcut ---- */
kbd {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 3px;
  box-shadow: 0 2px 0 var(--border);
  color: var(--fg);
  vertical-align: middle;
}

/* ---- Divider ---- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ---- Pill tabs ---- */
.tabs {
  display: flex;
  gap: 0.25rem;
  background: var(--bg-alt);
  border-radius: 4px;
  padding: 3px;
  width: fit-content;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 0.4rem 1rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-muted);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s;
}
.tab-btn:hover { color: var(--fg); }
.tab-btn.active {
  background: var(--bg-card);
  color: var(--fg);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

/* ---- Table ---- */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
}

tr:hover td { background: var(--bg-alt); }

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--fg);
  color: var(--bg);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.25s;
  pointer-events: none;
  z-index: 999;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Mobile Nav Hamburger ---- */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: all 0.25s;
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 58px; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
  }
  .nav__links.open { display: flex; }
  .nav__links a {
    padding: 0.75rem 2.5rem;
    font-size: 1rem;
  }
  .nav__links a::after { display: none; }
  .nav__burger { display: flex; }
}