/* ═══════════════════════════════════════════════════════════
   TaskFlow — main.css
   Aesthetic: refined editorial dark. Sparse. Monospace accents.
   DM Serif Display for brand marks, DM Sans for UI, DM Mono for data.
   ═══════════════════════════════════════════════════════════ */

/* ─── Reset & tokens ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Brand */
  --ink:        #0f0e0d;
  --ink-2:      #3d3c38;
  --ink-3:      #7a7872;
  --paper:      #faf9f7;
  --paper-2:    #f2f0eb;
  --paper-3:    #e8e5de;
  --accent:     #c97d3a;   /* warm amber — the one pop of color */
  --accent-dim: #e8c49a;
  --danger:     #b84040;

  /* Sidebar */
  --sidebar-w:  220px;
  --sidebar-bg: #0f0e0d;
  --sidebar-fg: #b8b4ac;
  --sidebar-fg-active: #faf9f7;

  /* Task priorities */
  --p-low:    #6b8f71;
  --p-med:    #b8963a;
  --p-high:   #c0622a;
  --p-urgent: #a82d2d;

  /* Type */
  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'DM Sans', system-ui, sans-serif;
  --font-mono:  'DM Mono', 'Courier New', monospace;

  /* Layout */
  --radius:   8px;
  --radius-lg: 12px;
  --shadow:   0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:     #f0ede8;
    --ink-2:   #b8b4ac;
    --ink-3:   #6e6b65;
    --paper:   #1a1916;
    --paper-2: #211f1b;
    --paper-3: #2c2a26;
    --sidebar-bg: #111009;
    --shadow:  0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  }
}

html { font-size: 15px; }

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

/* ─── Layout shell ────────────────────────────────────────── */
.layout {
  display: flex;
  min-height: 100dvh;
}

/* ─── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100dvh;
  overflow-y: auto;
  z-index: 200;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 20px 28px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 12px;
}

.logo-mark {
  color: var(--accent);
  font-size: 18px;
  line-height: 1;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 18px;
  color: #faf9f7;
  letter-spacing: -0.01em;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 10px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius);
  border: none;
  background: transparent;
  color: var(--sidebar-fg);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 400;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  text-align: left;
  width: 100%;
}

.nav-item:hover { background: rgba(255,255,255,0.06); color: var(--sidebar-fg-active); }
.nav-item.active { background: rgba(255,255,255,0.1); color: var(--sidebar-fg-active); font-weight: 500; }
.nav-icon { display: flex; align-items: center; opacity: 0.7; }
.nav-item.active .nav-icon { opacity: 1; }

.nav-badge {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
}

.sidebar-footer {
  padding: 16px 20px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: 12px;
}

.logout-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  border: none;
  background: none;
  color: var(--ink-3);
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  padding: 6px 0;
  transition: color 0.15s;
}
.logout-btn:hover { color: var(--danger); }

/* ─── Mobile sidebar overlay ─────────────────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 190;
}
.sidebar-overlay.active { display: block; }

/* ─── Main content ───────────────────────────────────────── */
.main {
  flex: 1;
  min-width: 0;
  padding: 32px 40px;
  max-width: 760px;
}

.main-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 32px;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.page-sub {
  font-size: 13px;
  color: var(--ink-3);
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}

.menu-toggle {
  display: none;
  border: none;
  background: none;
  color: var(--ink-2);
  cursor: pointer;
  padding: 4px;
}

/* ─── Quick-add / Capture ────────────────────────────────── */
.capture-zone {
  margin-bottom: 28px;
}

.capture-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--paper-2);
  border: 1.5px solid var(--paper-3);
  border-radius: var(--radius-lg);
  padding: 10px 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.capture-row:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(201, 125, 58, 0.12);
}

.capture-icon {
  font-size: 20px;
  color: var(--ink-3);
  font-weight: 300;
  line-height: 1;
  flex-shrink: 0;
  transition: color 0.15s;
}

.capture-row:focus-within .capture-icon { color: var(--accent); }

.capture-input {
  flex: 1;
  border: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--ink);
  outline: none;
}

.capture-input::placeholder { color: var(--ink-3); font-size: 14px; }

.capture-btn {
  flex-shrink: 0;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 6px;
  padding: 6px 16px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}
.capture-btn:hover { opacity: 0.8; }

@media (prefers-color-scheme: dark) {
  .capture-btn { background: var(--paper-3); color: var(--ink); }
}

/* ─── Task list ──────────────────────────────────────────── */
.task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.task-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  padding: 12px 14px;
  transition: border-color 0.15s, transform 0.1s;
  cursor: default;
  /* Priority left-border accent */
  border-left-width: 3px;
}

.task-card:hover { border-color: var(--paper-3); box-shadow: var(--shadow); }

/* Priority accent colors */
.priority-none   { border-left-color: var(--paper-3); }
.priority-low    { border-left-color: var(--p-low); }
.priority-medium { border-left-color: var(--p-med); }
.priority-high   { border-left-color: var(--p-high); }
.priority-urgent { border-left-color: var(--p-urgent); background: color-mix(in srgb, var(--p-urgent) 4%, var(--paper-2)); }

.task-card.overdue { background: color-mix(in srgb, var(--danger) 5%, var(--paper-2)); }

/* Check button */
.task-check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--paper-3);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, background 0.15s;
  position: relative;
}

.task-check:hover { border-color: var(--accent); }
.task-check:hover .check-ring::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  position: absolute;
}

.task-body {
  flex: 1;
  min-width: 0;
}

.task-title {
  font-size: 14.5px;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.task-due {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-3);
  margin-top: 2px;
  display: block;
}

.due-overdue { color: var(--danger); }

/* Priority badge */
.priority-badge {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 500;
}
.badge-low    { background: color-mix(in srgb, var(--p-low)    30%, transparent); color: var(--p-low); }
.badge-medium { background: color-mix(in srgb, var(--p-med)    25%, transparent); color: var(--p-med); }
.badge-high   { background: color-mix(in srgb, var(--p-high)   25%, transparent); color: var(--p-high); }
.badge-urgent { background: color-mix(in srgb, var(--p-urgent) 20%, transparent); color: var(--p-urgent); font-weight: 600; }

/* Task action buttons */
.task-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
}
.task-card:hover .task-actions { opacity: 1; }

.task-actions button {
  border: none;
  background: transparent;
  color: var(--ink-3);
  cursor: pointer;
  padding: 5px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s, color 0.12s;
}
.task-actions button:hover { background: var(--paper-3); color: var(--ink); }
.task-actions button:last-child:hover { color: var(--danger); }

/* ─── Empty & placeholder states ─────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-3);
}
.empty-icon {
  font-size: 28px;
  margin-bottom: 10px;
  color: var(--accent);
  opacity: 0.5;
}

.error-state {
  color: var(--danger);
  padding: 20px;
  font-size: 14px;
}

/* Shimmer placeholder */
.task-placeholder {
  height: 52px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
}

.shimmer {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--paper-2) 25%, var(--paper-3) 50%, var(--paper-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ─── Toast ──────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--ink);
  color: var(--paper);
  padding: 10px 22px;
  border-radius: 100px;
  font-size: 13.5px;
  font-weight: 500;
  z-index: 999;
  transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1), opacity 0.2s;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast.toast-error { background: var(--danger); }
.toast.toast-success { background: #3a6b45; }

/* ─── Auth pages ─────────────────────────────────────────── */
.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  background: var(--paper);
}

.auth-wrap { width: 100%; max-width: 420px; padding: 20px; }

.auth-card {
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
}

.auth-heading {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.auth-sub {
  color: var(--ink-3);
  font-size: 14px;
  margin-bottom: 28px;
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.field { display: flex; flex-direction: column; gap: 6px; }

.field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
}

.field input {
  background: var(--paper);
  border: 1.5px solid var(--paper-3);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 14.5px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(201,125,58,0.12);
}

.field-error { font-size: 12px; color: var(--danger); }

.auth-submit {
  margin-top: 8px;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: var(--radius);
  padding: 12px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}
.auth-submit:hover   { opacity: 0.85; }
.auth-submit:disabled { opacity: 0.5; cursor: not-allowed; }

.auth-error {
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 13.5px;
  margin-bottom: 8px;
}

.auth-switch {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--ink-3);
}
.auth-switch a { color: var(--accent); text-decoration: none; }
.auth-switch a:hover { text-decoration: underline; }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 700px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }
  .sidebar.open { transform: translateX(0); }

  .main { padding: 20px 16px; }
  .main-header { margin-bottom: 20px; }
  .page-title  { font-size: 24px; }
  .menu-toggle { display: flex; }

  .capture-input::placeholder { font-size: 13px; }

  .task-actions { opacity: 1; } /* always visible on touch */
}