/* GLASS / SURFACE UTILITIES — depend on tokens.css */

.glass {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(24px) saturate(140%);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  border: 1px solid var(--rule);
}
.glass-soft {
  background: rgba(255, 255, 255, 0.025);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--rule);
}
.glass-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--rule);
  padding: var(--s-7);
  border-radius: var(--r-2);
  transition: transform var(--dur-3) var(--ease), border-color var(--dur-3) var(--ease), background var(--dur-3) var(--ease);
}
.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.045);
}

/* light-theme variants flip the alphas */
[data-theme="light"] .glass,
[data-theme="light"] .glass-card,
[data-theme="light"] .glass-soft {
  background: rgba(0, 0, 0, 0.025);
  border-color: rgba(0, 0, 0, 0.10);
}
[data-theme="light"] .glass-card:hover {
  background: rgba(0, 0, 0, 0.04);
  border-color: var(--accent);
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 16px 36px;
  font-size: var(--fs-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--dur-2) var(--ease);
  font-family: var(--font-b);
  border-radius: var(--r-1);
  position: relative;
  overflow: hidden;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent2); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0,0,0,0.35); }
.btn-outline { background: transparent; border-color: var(--rule); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost { background: rgba(255,255,255,0.04); border-color: var(--rule); color: var(--text); backdrop-filter: blur(10px); }
.btn-ghost:hover { background: rgba(255,255,255,0.08); border-color: var(--accent); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--accent);
  position: relative;
  padding-bottom: 4px;
}
.link-arrow::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform-origin: right;
  transform: scaleX(0);
  transition: transform var(--dur-2) var(--ease);
}
.link-arrow:hover::after { transform-origin: left; transform: scaleX(1); }
.link-arrow svg { width: 14px; transition: transform var(--dur-2) var(--ease); }
.link-arrow:hover svg { transform: translateX(6px); }