/* =========================================================================
   Reusable surfaces
   ========================================================================= */

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: var(--shadow-sm);
}

.form-panel {
  display: grid;
  gap: 14px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}

.section-head h2,
.section-head h3 {
  font-family: var(--font-display);
}

.section-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.section-bar h2 {
  font-size: 1.45rem;
}

.section-bar h3 {
  font-size: 1.05rem;
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: -0.005em;
}

.section-bar.compact {
  margin: 8px 0 6px;
}

.view-bar {
  align-items: flex-end;
  margin-bottom: 14px;
}

.inline-section {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.tab-stack {
  display: grid;
  gap: 22px;
}

.tab-panel {
  padding: clamp(14px, 4vw, 24px);
  border-radius: var(--r-xl);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-xs);
}

.empty-panel,
.loading-panel {
  display: grid;
  gap: 12px;
  justify-items: center;
  text-align: center;
  padding: 40px 24px;
}

.loader {
  width: 22px;
  height: 22px;
  border-radius: var(--r-full);
  border: 2px solid var(--line-strong);
  border-top-color: var(--accent);
  animation: spin 0.85s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.inline-error {
  padding: 12px 14px;
  border-radius: var(--r-sm);
  border: 1px solid color-mix(in srgb, var(--busy) 25%, var(--line));
  background: var(--busy-soft);
  color: var(--busy);
  font-size: 0.9rem;
}

.inline-error.standalone {
  margin-top: 12px;
}

/* =========================================================================
   Buttons
   ========================================================================= */

.button {
  --btn-bg: var(--ink);
  --btn-fg: var(--bg);
  --btn-bd: transparent;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--r-full);
  font-weight: 600;
  font-size: 0.94rem;
  letter-spacing: -0.005em;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  transition:
    transform 120ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    color 160ms ease;
  white-space: nowrap;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:active:not(:disabled) {
  transform: translateY(0);
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.button.small {
  padding: 8px 14px;
  font-size: 0.86rem;
}

.button.tiny {
  padding: 5px 10px;
  font-size: 0.74rem;
}

.button.primary {
  --btn-bg: var(--accent);
  --btn-fg: var(--on-accent);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 30%, transparent);
}

.button.primary:hover:not(:disabled) {
  --btn-bg: var(--accent-deep);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 38%, transparent);
}

.button.secondary {
  --btn-bg: var(--ink);
  --btn-fg: var(--bg);
}

.button.secondary:hover:not(:disabled) {
  --btn-bg: color-mix(in srgb, var(--ink) 88%, var(--accent));
}

.button.ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  --btn-bd: var(--line-strong);
}

.button.ghost:hover:not(:disabled) {
  --btn-bg: color-mix(in srgb, var(--ink) 5%, transparent);
  --btn-bd: var(--ink-faint);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.icon-button {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-full);
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 1rem;
  transition: background-color 160ms ease, border-color 160ms ease, transform 120ms ease;
}

.icon-button:hover {
  background: var(--surface-2);
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

.icon-button-small {
  width: 30px;
  height: 30px;
  font-size: 0.85rem;
}

/* =========================================================================
   Toggle / pill buttons
   ========================================================================= */

.toggle-button,
.invite-lane-button,
.search-kind-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease,
    transform 120ms ease;
}

.toggle-button:hover,
.invite-lane-button:hover,
.search-kind-pill:hover {
  color: var(--ink);
  border-color: var(--line-strong);
}

.toggle-button.active,
.invite-lane-button.active,
.search-kind-pill.active {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.tab-icon {
  font-size: 1rem;
  display: inline-flex;
}

/* =========================================================================
   Fields / inputs
   ========================================================================= */

.field {
  display: grid;
  gap: 6px;
}

.field label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.field input,
.field textarea,
.field select,
.input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-size: 1rem;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.field input:focus,
.field textarea:focus,
.field select:focus,
.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-haze);
}

.field textarea {
  min-height: 92px;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--ink-mute);
}

.stack-form {
  display: grid;
  gap: 14px;
}

.inline-button-field {
  display: flex;
  gap: 8px;
  align-items: center;
}

.inline-button-field input {
  flex: 1;
}

.auth-mode-row {
  display: inline-flex;
  gap: 6px;
  padding: 4px;
  border-radius: var(--r-full);
  background: var(--surface-2);
  border: 1px solid var(--line);
  width: fit-content;
}

.auth-mode-row .button.small {
  padding: 6px 12px;
  border-radius: var(--r-full);
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  box-shadow: none;
}

.auth-mode-row .button.small.secondary {
  background: var(--ink);
  color: var(--bg);
}

/* =========================================================================
   Status pills / tags
   ========================================================================= */

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: var(--unknown-soft);
  color: var(--ink-soft);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.status-chip.upcoming,
.status-chip.ready,
.status-chip.celebration {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.status-chip.done {
  background: var(--free-soft);
  color: var(--free);
}

.status-chip.cancelled {
  background: var(--busy-soft);
  color: var(--busy);
}

.status-chip.saved {
  background: color-mix(in srgb, var(--ink) 8%, transparent);
  color: var(--ink-soft);
}

.status-chip.private {
  background: color-mix(in srgb, var(--ink) 10%, transparent);
  color: var(--ink-soft);
}

.status-chip.trip {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.status-chip.birthday {
  background: #fff0b8;
  color: #7b3f00;
}

.status-chip.empty {
  background: var(--unknown-soft);
}

/* =========================================================================
   Toast
   ========================================================================= */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--dock-height) + var(--safe-bottom) + 18px);
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--r-full);
  background: var(--ink);
  color: var(--bg);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 80;
  animation: toast-pop 220ms ease;
  max-width: calc(100% - 32px);
}

@keyframes toast-pop {
  from {
    transform: translate(-50%, 12px);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

.toast-icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
  align-items: center;
  justify-content: center;
}

.toast.vibe-success {
  background: var(--free);
  color: #fff;
}

.toast.vibe-error,
.toast.vibe-danger {
  background: var(--busy);
  color: #fff;
}

.toast.vibe-info {
  background: var(--ink);
  color: var(--bg);
}

@media (min-width: 900px) {
  .toast {
    bottom: 28px;
  }
}