/* ─── kj-tracker style.css ───
   Design language: mirrors life-well-spent. Dark surface by default,
   light via [data-theme="light"] on <html>. Cards with thin borders,
   monospace headings, single accent colour, no shadows.

   The custom CSS in this file is for things Tailwind can't express as
   utilities: per-element layout like the toolbar, the form grid, the
   history chart's ticks. Component variants (cards, buttons, fields)
   are Tailwind utility classes in index.html — the tokens they use
   (--color-surface, --color-border, etc.) come from theme.css. */

/* ─── Layout ─── */
.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-main {
  flex: 1;
  max-width: var(--container-page);
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .app-main { padding: 2rem 1.5rem 5rem; gap: 2rem; }
}

/* ─── Header ─── */
.app-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}

.app-header-inner {
  max-width: var(--container-page);
  margin: 0 auto;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.app-brand {
  display: flex;
  align-items: baseline;
  gap: 0.625rem;
  text-decoration: none;
  color: inherit;
}

.app-brand-mark {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-accent) 0%, color-mix(in oklab, var(--color-accent) 60%, #1a1a24) 100%);
  display: inline-grid;
  place-items: center;
  color: var(--color-accent-fg);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0;
  flex: 0 0 auto;
  align-self: center;
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--color-accent) 25%, transparent),
              0 0 8px 0 var(--color-accent-glow);
}

.app-brand-name {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.app-brand-tag {
  font-size: 0.75rem;
  color: var(--color-text-mute);
  letter-spacing: 0.02em;
}

.app-header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-mute);
}

.app-status[data-state="ready"] { color: var(--color-accent); }
.app-status[data-state="error"] { color: var(--color-danger); }

/* ─── Section / card ─── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.card:hover {
  border-color: color-mix(in oklab, var(--color-accent) 25%, var(--color-border));
}

@media (min-width: 640px) {
  .card { padding: 1.5rem; }
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.card-sub {
  font-size: 0.75rem;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ─── Form ─── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
}

@media (min-width: 640px) {
  .form-grid--two { grid-template-columns: 1fr 1fr; }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.field-label {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.field-input,
.field-select,
.field-textarea {
  width: 100%;
  padding: 0.625rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}

.field-input:focus,
.field-select:focus,
.field-textarea:focus {
  border-color: var(--color-accent);
  background: var(--color-surface);
}

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

.field-textarea {
  min-height: 2.5rem;
  resize: vertical;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-top: 0.5rem;
}

/* ─── Typeahead dropdown ─── */
.typeahead {
  position: relative;
  z-index: 30;
}

.typeahead-list {
  position: absolute;
  top: calc(100% + 0.25rem);
  left: 0;
  right: 0;
  z-index: 30;
  max-height: 16rem;
  overflow-y: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.typeahead-item {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.typeahead-item:last-child { border-bottom: 0; }
.typeahead-item:hover,
.typeahead-item[aria-selected="true"] {
  background: var(--color-surface-hover);
}

.typeahead-item-name {
  font-size: 0.9rem;
  color: var(--color-text);
}

.typeahead-item-meta {
  font-size: 0.7rem;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 500;
  line-height: 1.2;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
  user-select: none;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(180deg, var(--color-accent) 0%, color-mix(in oklab, var(--color-accent) 85%, #000) 100%);
  color: var(--color-accent-fg);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--color-accent) 30%, transparent),
              0 1px 0 0 color-mix(in oklab, var(--color-accent) 50%, transparent);
}

.btn-primary:hover:not(:disabled) {
  filter: brightness(1.1);
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--color-accent) 50%, transparent),
              0 0 12px 0 var(--color-accent-glow);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-hover);
  border-color: var(--color-text-mute);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-dim);
  border-color: transparent;
  padding: 0.4rem 0.6rem;
}

.btn-ghost:hover:not(:disabled) {
  color: var(--color-text);
  background: var(--color-surface);
}

.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border-color: var(--color-border);
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger);
  color: var(--color-danger-fg);
  border-color: var(--color-danger);
}

.btn-sm {
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
}

.btn-icon {
  width: 1.875rem;
  height: 1.875rem;
  padding: 0;
  display: inline-grid;
  place-items: center;
  background: transparent;
  color: var(--color-text-dim);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.btn-icon:hover { color: var(--color-text); background: var(--color-surface-hover); }
.btn-icon:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 1px; }

.btn-icon svg { display: block; }

/* ─── Day card: total kJ + macro split ─── */
.day-total {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.day-total-number {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.day-total-unit {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-text-dim);
  margin-left: 0.25rem;
  font-weight: 400;
}

.day-macros {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.day-macro {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.day-macro-label {
  font-size: 0.7rem;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.day-macro-value {
  font-size: 0.95rem;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

/* ─── Entries list ─── */
.entries {
  display: flex;
  flex-direction: column;
}

.entries-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.75rem 0;
  font-size: 0.7rem;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.entries-empty {
  padding: 1.25rem 0;
  color: var(--color-text-mute);
  font-size: 0.85rem;
  text-align: center;
}

.entry {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.625rem 0;
  border-top: 1px solid var(--color-border);
}

.entry-main {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  min-width: 0;
}

.entry-name {
  font-size: 0.9rem;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.entry-meta {
  font-size: 0.7rem;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.entry-kj {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.entry-kj-unit {
  color: var(--color-text-mute);
  margin-left: 0.125rem;
  font-size: 0.75rem;
}

.entry-actions {
  display: flex;
  gap: 0.25rem;
}

/* ─── History chart ─── */
.history-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.history-range {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.history-range button {
  background: transparent;
  color: var(--color-text-dim);
  border: 0;
  padding: 0.3rem 0.625rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

.history-range button + button {
  border-left: 1px solid var(--color-border);
}

.history-range button[aria-pressed="true"] {
  background: var(--color-accent);
  color: var(--color-accent-fg);
}

.history-range button:hover:not([aria-pressed="true"]) {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.history-chart {
  width: 100%;
  height: 9rem;
  display: block;
}

.history-empty {
  padding: 2.5rem 0;
  text-align: center;
  color: var(--color-text-mute);
  font-size: 0.85rem;
}

/* ─── Backup card ─── */
.backup-help {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.backup-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ─── Footer ─── */
.app-footer {
  text-align: center;
  padding: 1.5rem 1.25rem 2rem;
  font-size: 0.7rem;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.app-footer a {
  color: var(--color-text-dim);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.app-footer a:hover { color: var(--color-text); }

/* ─── Theme toggle ─── */
.theme-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.theme-toggle button {
  background: transparent;
  color: var(--color-text-dim);
  border: 0;
  padding: 0.3rem 0.5rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  cursor: pointer;
}

.theme-toggle button + button {
  border-left: 1px solid var(--color-border);
}

.theme-toggle button[aria-pressed="true"] {
  background: var(--color-surface);
  color: var(--color-text);
}

.theme-toggle button:hover:not([aria-pressed="true"]) {
  color: var(--color-text);
}
