/* ── CSS variables ────────────────────────────────────────────────────────────
   Edit these to retheme the entire app.
   ─────────────────────────────────────────────────────────────────────────── */
:root {
  /* Brand */
  --color-accent:       #6366f1;  /* indigo */
  --color-accent-hover: #4f46e5;
  --color-accent-soft:  #eef2ff;

  /* Surface */
  --color-bg:           #0f0f11;
  --color-surface:      #1a1a1f;
  --color-surface-2:    #26262d;
  --color-border:       #2e2e38;

  /* Text */
  --color-text:         #e8e8ed;
  --color-text-muted:   #8b8b9e;
  --color-text-faint:   #4a4a5a;

  /* Status colours */
  --color-open:         #6366f1;
  --color-waiting:      #f59e0b;
  --color-done:         #22c55e;
  --color-archived:     #6b7280;

  /* Danger */
  --color-danger:       #ef4444;
  --color-danger-hover: #dc2626;

  /* Spacing scale */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  20px;
  --sp-6:  24px;
  --sp-8:  32px;
  --sp-10: 40px;
  --sp-12: 48px;

  /* Typography */
  --font-sans: system-ui, -apple-system, "Inter", "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;
  --font-size-xs:   11px;
  --font-size-sm:   13px;
  --font-size-base: 15px;
  --font-size-lg:   17px;
  --font-size-xl:   20px;
  --font-size-2xl:  24px;

  /* Layout */
  --sidebar-width:    240px;
  --detail-width:     360px;
  --header-height:    52px;
  --bottom-nav-height: 56px;
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.4);
  --shadow-md:  0 4px 12px rgba(0,0,0,.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.6);
}

/* ── Reset ────────────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: var(--font-size-base);
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-text-size-adjust: 100%;
  height: 100%;
}

body {
  height: 100%;
  overflow: hidden;   /* outer scroll managed per-panel */
  line-height: 1.5;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

img, svg { display: block; }

/* ── App shell layout ─────────────────────────────────────────────────────── */

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Login screen — shown before auth */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  padding: var(--sp-6);
}

/* Main layout — shown after auth */
#main-layout {
  display: none;     /* shown by JS after login */
  flex: 1;
  overflow: hidden;
}

#main-layout.visible { display: flex; }

/* Desktop: sidebar + content (3-pane at ≥1024px) */
@media (min-width: 1024px) {
  #main-layout {
    flex-direction: row;
  }

  #sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    height: 100%;
  }

  #content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
  }

  #bottom-nav  { display: none; }
  #fab-capture { display: none; }
}

/* Mobile: single pane + bottom nav */
@media (max-width: 1023px) {
  #main-layout {
    flex-direction: column;
  }

  #sidebar {
    display: none;   /* replaced by drawer */
  }

  #content-area {
    flex: 1;
    overflow: hidden;
    padding-bottom: var(--bottom-nav-height);
  }
}

/* ── Header ───────────────────────────────────────────────────────────────── */

#app-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0 var(--sp-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
}

#app-header .header-title {
  flex: 1;
  font-size: var(--font-size-lg);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#app-header .header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */

.sidebar-section {
  padding: var(--sp-4) var(--sp-3) var(--sp-2);
}

.sidebar-section-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-faint);
  padding: 0 var(--sp-2) var(--sp-2);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  min-height: 36px;
}

.sidebar-nav-item:hover,
.sidebar-nav-item.active {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.sidebar-nav-item.active {
  color: var(--color-accent);
}

.project-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Bottom nav (mobile) ──────────────────────────────────────────────────── */

#bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  display: flex;
  align-items: stretch;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  z-index: 100;
}

.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
  min-height: 44px;
}

.bottom-nav-item.active,
.bottom-nav-item:active { color: var(--color-accent); }

.bottom-nav-item svg { width: 22px; height: 22px; }

/* FAB — floating capture button above bottom nav */
#fab-capture {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + var(--sp-4));
  right: var(--sp-5);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  z-index: 101;
  border: none;
  font-size: 24px;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

#fab-capture:active {
  background: var(--color-accent-hover);
  transform: scale(.94);
}

/* ── Login card ───────────────────────────────────────────────────────────── */

.login-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  width: 100%;
  max-width: 360px;
  box-shadow: var(--shadow-lg);
}

.login-card h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--sp-2);
}

.login-card .subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--sp-6);
}

/* ── Forms ────────────────────────────────────────────────────────────────── */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

.form-input,
.form-select,
.form-textarea {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--font-size-base);
  color: var(--color-text);
  width: 100%;
  transition: border-color var(--transition-fast);
  min-height: 44px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition-fast), opacity var(--transition-fast);
  min-height: 44px;
  white-space: nowrap;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: var(--color-accent-hover); }

.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-border); }

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

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
  min-height: unset;
}

/* ── Content area / view panels ───────────────────────────────────────────── */

.view-panel {
  display: none;
  flex: 1;
  flex-direction: column;
  overflow: hidden;
  height: 100%;
}

.view-panel.active { display: flex; }

.view-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.view-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-4);
}

/* ── Item rows (list view) ────────────────────────────────────────────────── */

.item-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  min-height: 44px;
  border-bottom: 1px solid var(--color-border);
}

.item-row:last-child { border-bottom: none; }

.item-row:hover { background: var(--color-surface-2); }

.item-row.done .item-title {
  text-decoration: line-through;
  color: var(--color-text-faint);
}

.item-status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.item-title {
  flex: 1;
  font-size: var(--font-size-base);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.item-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* ── Tags ─────────────────────────────────────────────────────────────────── */

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 2px var(--sp-2);
  border-radius: 100px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ── Modal / sheet ────────────────────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 200;
  animation: fade-in var(--transition-base);
}

@media (min-width: 640px) {
  .modal-overlay { align-items: center; }
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  width: 100%;
  max-height: 92vh;
  overflow-y: auto;
  padding: var(--sp-6);
  animation: slide-up var(--transition-base);
}

@media (min-width: 640px) {
  .modal {
    border-radius: var(--radius-xl);
    max-width: 560px;
    max-height: 88vh;
  }
}

.modal-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
}

.modal-title {
  flex: 1;
  font-size: var(--font-size-xl);
  font-weight: 700;
}

/* ── Skeleton loading ─────────────────────────────────────────────────────── */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-2) 25%,
    var(--color-border)    50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}

/* ── Toast notifications ──────────────────────────────────────────────────── */

#toast-container {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + var(--sp-4));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  z-index: 300;
  pointer-events: none;
}

@media (min-width: 1024px) {
  #toast-container {
    bottom: var(--sp-6);
    left: auto;
    right: var(--sp-6);
    transform: none;
  }
}

.toast {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-3) var(--sp-5);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md);
  animation: slide-up var(--transition-base);
  pointer-events: all;
  white-space: nowrap;
}

.toast.toast-error { border-color: var(--color-danger); }
.toast.toast-ok    { border-color: var(--color-done); }

/* ── Status badge ─────────────────────────────────────────────────────────── */

.status-badge {
  display: inline-block;
  padding: 2px var(--sp-2);
  border-radius: 100px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.status-open     { background: #1e1e4a; color: var(--color-open); }
.status-waiting  { background: #2e1e04; color: var(--color-waiting); }
.status-done     { background: #0f2e1e; color: var(--color-done); }
.status-archived { background: var(--color-surface-2); color: var(--color-archived); }

/* ── Utility classes ──────────────────────────────────────────────────────── */

.hidden    { display: none !important; }
.sr-only   { position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); }
.truncate  { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.flex      { display: flex; }
.flex-col  { flex-direction: column; }
.items-center { align-items: center; }
.gap-2     { gap: var(--sp-2); }
.gap-3     { gap: var(--sp-3); }
.gap-4     { gap: var(--sp-4); }
.mt-4      { margin-top: var(--sp-4); }
.mt-6      { margin-top: var(--sp-6); }
.mb-4      { margin-bottom: var(--sp-4); }
.text-muted   { color: var(--color-text-muted); }
.text-sm      { font-size: var(--font-size-sm); }
.text-xs      { font-size: var(--font-size-xs); }
.font-bold    { font-weight: 700; }
.w-full       { width: 100%; }

/* ── Animations ───────────────────────────────────────────────────────────── */

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slide-up {
  from { transform: translateY(12px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

@keyframes shimmer {
  from { background-position:  200% 0; }
  to   { background-position: -200% 0; }
}

/* ── Scrollbar ────────────────────────────────────────────────────────────── */

::-webkit-scrollbar              { width: 6px; height: 6px; }
::-webkit-scrollbar-track        { background: transparent; }
::-webkit-scrollbar-thumb        { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover  { background: var(--color-text-faint); }