/* ════════════════════════════════════════════════════════════════
   KAL FOUNDRY · COMPONENTS · v1.0
   Buttons, inputs, badges, cards, tables.
   Load AFTER tokens.css and base.css.
   ════════════════════════════════════════════════════════════════ */

/* ── BUTTON ────────────────────────────────────────────────────── */
.kf-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font-family: var(--kf-font);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  background: transparent;
  color: var(--kf-ink);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  position: relative;
  transition:
    background var(--kf-d-fast) var(--kf-ease-stamp),
    color var(--kf-d-fast) var(--kf-ease-stamp),
    border-color var(--kf-d-fast) var(--kf-ease-stamp),
    box-shadow var(--kf-d-fast) var(--kf-ease-stamp),
    transform var(--kf-d-fast) var(--kf-ease-stamp);
}
.kf-btn:active { transform: translateY(1px); }
.kf-btn:focus-visible {
  outline: 2px solid var(--kf-accent);
  outline-offset: 2px;
}

.kf-btn--primary {
  background: var(--kf-brass-400);
  color: var(--kf-obsidian-950);
  border-color: var(--kf-brass-400);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.18);
}
.kf-btn--primary:hover {
  background: var(--kf-brass-300);
  border-color: var(--kf-brass-300);
}
.kf-btn--primary:active {
  background: var(--kf-brass-500);
  border-color: var(--kf-brass-500);
  box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0.22);
}

.kf-btn--secondary {
  border-color: var(--kf-brass-700);
  background: var(--kf-obsidian-800);
  color: var(--kf-ink);
}
.kf-btn--secondary:hover {
  border-color: var(--kf-accent);
  color: var(--kf-accent);
  background: var(--kf-obsidian-700);
}

.kf-btn--ghost {
  color: var(--kf-accent);
  padding-left: 14px;
  padding-right: 14px;
  border: 1px dashed var(--kf-hairline-strong);
}
.kf-btn--ghost:hover {
  color: var(--kf-obsidian-950);
  background: var(--kf-accent);
  border-color: var(--kf-accent);
  border-style: solid;
}

.kf-btn--danger {
  background: var(--kf-ember);
  color: #fff;
  border-color: var(--kf-ember);
}
.kf-btn--danger:hover { filter: brightness(1.1); }

.kf-btn--sm { padding: 8px 14px; font-size: 13px; }
.kf-btn--lg { padding: 16px 28px; font-size: 15px; }

.kf-btn[disabled],
.kf-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── INPUT / FIELD ─────────────────────────────────────────────── */
.kf-field {
  display: flex;
  flex-direction: column;
  gap: var(--kf-s-2);
}

.kf-field-label {
  font-family: var(--kf-font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--kf-ink-3);
}

.kf-input,
.kf-textarea,
.kf-select {
  background: var(--kf-obsidian-1000);
  border: 1px solid var(--kf-hairline-strong);
  color: var(--kf-ink);
  padding: 12px 14px;
  font-family: var(--kf-font);
  font-size: 14px;
  width: 100%;
  transition:
    border-color var(--kf-d-fast) var(--kf-ease-stamp),
    background var(--kf-d-fast) var(--kf-ease-stamp);
}
.kf-input:focus,
.kf-textarea:focus,
.kf-select:focus {
  outline: none;
  border-color: var(--kf-accent);
  background: var(--kf-obsidian-900);
}
.kf-input::placeholder,
.kf-textarea::placeholder {
  color: var(--kf-bone-400);
}

.kf-textarea { min-height: 96px; resize: vertical; }

/* ── BADGE ─────────────────────────────────────────────────────── */
.kf-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--kf-font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--kf-hairline-strong);
  color: var(--kf-ink-2);
  background: var(--kf-obsidian-1000);
}
.kf-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--kf-accent);
  flex-shrink: 0;
}
.kf-badge--patina::before   { background: var(--kf-patina); }
.kf-badge--ember::before    { background: var(--kf-ember); }
.kf-badge--crucible::before { background: var(--kf-crucible); }
.kf-badge--steel::before    { background: var(--kf-steel); }

/* ── CARD ──────────────────────────────────────────────────────── */
.kf-card {
  background: var(--kf-surface);
  border: var(--kf-border);
  padding: var(--kf-s-6);
  position: relative;
}

.kf-card--stamped {
  /* Card with chiseled corner marks — use for hero/system surfaces */
}
.kf-card--stamped::before,
.kf-card--stamped::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border: 1px solid var(--kf-brass-700);
}
.kf-card--stamped::before {
  top: -1px; left: -1px;
  border-right: 0; border-bottom: 0;
}
.kf-card--stamped::after {
  bottom: -1px; right: -1px;
  border-left: 0; border-top: 0;
}

/* ── STAT BLOCK (mono numerics, mono caption) ──────────────────── */
.kf-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.kf-stat .v {
  font-family: var(--kf-font-mono);
  font-size: 22px;
  color: var(--kf-ink);
  letter-spacing: -0.02em;
  font-feature-settings: "tnum";
}
.kf-stat .k {
  font-family: var(--kf-font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--kf-ink-3);
}

/* ── TABLE ─────────────────────────────────────────────────────── */
.kf-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.kf-table th,
.kf-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--kf-hairline);
}
.kf-table th {
  font-family: var(--kf-font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--kf-ink-3);
  font-weight: 500;
  border-bottom: 1px solid var(--kf-hairline-strong);
}
.kf-table td.kf-num-cell {
  font-family: var(--kf-font-mono);
  font-feature-settings: "tnum";
  text-align: right;
  letter-spacing: -0.01em;
}

/* ── RAIL (top app bar) ────────────────────────────────────────── */
.kf-rail {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--kf-page-pad);
  background: rgba(10, 9, 7, 0.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--kf-hairline);
}

/* ── CHECKBOX / RADIO ──────────────────────────────────────────── */
.kf-check {
  appearance: none;
  width: 16px; height: 16px;
  border: 1px solid var(--kf-hairline-strong);
  background: var(--kf-obsidian-1000);
  cursor: pointer;
  position: relative;
  transition: border-color var(--kf-d-fast) var(--kf-ease-stamp);
}
.kf-check:hover { border-color: var(--kf-accent); }
.kf-check:checked {
  background: var(--kf-brass-400);
  border-color: var(--kf-brass-400);
}
.kf-check:checked::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--kf-obsidian-950);
}
.kf-check[type="radio"] { border-radius: 50%; }
.kf-check[type="radio"]:checked::after { border-radius: 50%; }