/* ===== Tokens ===== */
:root {
  --bg: #0B0F1A;
  --surface: #131826;
  --surface-2: #1A2033;
  --border: #232B3D;
  --text: #E7EAF0;
  --text-muted: #8B93A7;
  --accent: #33D6A6;
  --accent-2: #5B8CFF;
  --warn: #F5A623;
  --danger: #FF6B6B;
  --purple: #8B7CF6;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
  --font-display: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
}

[data-theme="light"] {
  --bg: #F5F6FA;
  --surface: #FFFFFF;
  --surface-2: #F0F2F8;
  --border: #E3E6EF;
  --text: #171B2B;
  --text-muted: #666F87;
  --shadow: 0 8px 24px rgba(23,27,43,0.08);
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
[data-theme="light"] html, html:has([data-theme="light"]) { color-scheme: light; }
body { overflow-x: hidden; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% -10%, color-mix(in srgb, var(--accent) 14%, transparent) 0%, transparent 38%),
    radial-gradient(circle at 90% 0%, color-mix(in srgb, var(--accent-2) 12%, transparent) 0%, transparent 35%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}

a { color: inherit; }
button, input, select { font-family: var(--font-body); }

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

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* ===== Header ===== */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  z-index: 30;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
}
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  transition: color .15s, background .15s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text);
  background: var(--surface-2);
}

.header-actions { display: flex; align-items: center; gap: 10px; }

.icon-btn {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 16px;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

.btn-add {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #06231a;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  display: grid; place-items: center;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 45%, transparent);
}
.btn-add:hover { filter: brightness(1.08); }

.user-pill {
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

/* ===== Footer ===== */
.site-footer {
  margin-top: 48px;
  padding: 28px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}
.site-footer .quote { font-family: var(--font-display); font-style: italic; color: var(--text); font-size: 15px; margin-bottom: 6px; }

/* ===== Layout helpers ===== */
.stack { display: flex; flex-direction: column; gap: 20px; }
.section-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin: 0 0 12px;
}
.grid-2 { display: grid; grid-template-columns: 1.3fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-7 { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-7 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .page { padding: 0 14px 48px; }
  .card { padding: 15px; }
  .site-header {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas: "brand actions" "nav nav";
    row-gap: 10px;
    padding: 14px 16px;
  }
  .brand { grid-area: brand; }
  .header-actions { grid-area: actions; gap: 6px; }
  .nav-links { grid-area: nav; }
  .nav-links a { flex: 1; text-align: center; padding: 8px 6px; }
  .user-pill { display: none; }
  .modal-overlay { padding: 5vh 10px; }
  .modal { padding: 18px; }
  .weekday-picker { gap: 4px; }
  .weekday-picker label { width: 30px; height: 30px; font-size: 10px; }
  .stat-row { gap: 16px; }
  .stat .num { font-size: 22px; }
  .grid-7 { display: flex; flex-direction: column; }
  .day-col { min-height: 0; }
}

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ===== Card ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}
.card-title { font-size: 15px; font-weight: 700; margin-bottom: 14px; display: flex; align-items: center; justify-content: space-between; }

/* ===== Chips (task / habit rows) ===== */
.chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--chip-color, var(--accent-2)) 9%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--chip-color, var(--accent-2)) 18%, var(--border));
  border-left: 4px solid var(--chip-color, var(--accent-2));
  margin-bottom: 8px;
  cursor: grab;
}
.chip.type-habit { --chip-color: var(--accent); }
.chip.type-task { --chip-color: var(--accent-2); }
.chip:last-child { margin-bottom: 0; }
.chip.completed { opacity: .55; background: var(--surface-2); border-color: var(--border); }
.chip.completed .chip-title { text-decoration: line-through; }
.chip.dragging { opacity: .4; }

.chip-check {
  width: 24px; height: 24px;
  border-radius: 7px;
  border: 2px solid var(--chip-color, var(--text-muted));
  display: grid; place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  background: transparent;
  color: transparent;
  font-size: 13px;
}
.chip.completed .chip-check { background: var(--chip-color, var(--accent)); border-color: var(--chip-color, var(--accent)); color: #06231a; }
.chip.type-habit .chip-check { border-radius: 50%; }

.chip-body { flex: 1; min-width: 0; }
.chip-title { font-size: 13.5px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chip-meta { font-size: 11px; color: var(--text-muted); display: flex; gap: 6px; align-items: center; margin-top: 2px; flex-wrap: wrap; }
.type-tag { font-size: 9.5px; text-transform: uppercase; letter-spacing: .05em; padding: 2px 7px; border-radius: 999px; font-weight: 800; }
.type-tag.task { background: var(--accent-2); color: #071026; }
.type-tag.habit { background: var(--accent); color: #06231a; }

.chip-actions { display: flex; gap: 4px; opacity: .55; transition: opacity .15s; }
.chip:hover .chip-actions, .chip:focus-within .chip-actions { opacity: 1; }
.chip-actions button {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  width: 28px; height: 28px; border-radius: 6px; font-size: 14px;
}
.chip-actions button:hover { color: var(--text); background: var(--border); }

/* ===== Progress ring ===== */
.ring-wrap { position: relative; display: inline-grid; place-items: center; }
.ring-wrap svg { transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--border); }
.ring-fg { fill: none; stroke-linecap: round; transition: stroke-dashoffset .4s ease; }
.ring-label { position: absolute; font-family: var(--font-display); font-weight: 700; }

/* ===== Day column (week view) ===== */
.day-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  min-height: 140px;
  min-width: 0;
  transition: border-color .15s, background .15s;
}
.day-col.drop-hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }
.day-col-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 10px; }
.day-name { font-size: 12px; font-weight: 700; text-transform: uppercase; color: var(--text-muted); }
.day-num { font-family: var(--font-display); font-weight: 700; font-size: 14px; }
.day-col.is-today { border-color: var(--accent); }
.day-empty { font-size: 12px; color: var(--text-muted); padding: 6px 0; }

/* ===== Heatmap (GitHub style) ===== */
.heatmap { display: grid; grid-template-rows: repeat(7, 11px); grid-auto-flow: column; grid-auto-columns: 11px; gap: 3px; overflow-x: auto; padding-bottom: 4px; }
.heatmap-cell {
  width: 11px; height: 11px; border-radius: 3px;
  background: var(--border);
  cursor: default;
}
.heatmap-cell[data-level="1"] { background: var(--danger); }
.heatmap-cell[data-level="2"] { background: var(--warn); }
.heatmap-cell[data-level="3"] { background: var(--accent-2); }
.heatmap-cell[data-level="4"] { background: var(--accent); }
.heatmap-legend { display: flex; align-items: center; gap: 4px; font-size: 11px; color: var(--text-muted); margin-top: 8px; }

/* ===== Buttons / forms ===== */
.btn {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #06231a; }
.btn-primary:hover { filter: brightness(1.06); }
.btn-block { width: 100%; }
.btn-ghost { background: none; border: none; color: var(--text-muted); }

label { font-size: 12.5px; font-weight: 600; color: var(--text-muted); display: block; margin-bottom: 5px; }
.field { margin-bottom: 14px; }
input[type="text"], input[type="password"], input[type="date"], select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 14px;
}
.weekday-picker { display: flex; gap: 6px; }
.weekday-picker input { display: none; }
.weekday-picker label {
  margin: 0; display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface-2);
  font-size: 11px; font-weight: 700; cursor: pointer; color: var(--text-muted);
}
.weekday-picker input:checked + label { background: var(--accent); border-color: var(--accent); color: #06231a; }
.type-toggle { display: flex; gap: 8px; }
.type-toggle input { display: none; }
.type-toggle label {
  flex: 1; text-align: center; padding: 9px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); cursor: pointer; font-size: 13px; font-weight: 600; color: var(--text-muted);
}
.type-toggle input:checked + label { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
#typeTask:checked + label { border-color: var(--accent-2); color: var(--accent-2); background: color-mix(in srgb, var(--accent-2) 10%, transparent); }
#typeHabit:checked + label { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(4,6,12,.6);
  display: none; align-items: flex-start; justify-content: center;
  padding: 8vh 16px; z-index: 100; backdrop-filter: blur(2px);
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; width: 420px; max-width: 100%;
  box-shadow: var(--shadow);
}
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 18px; cursor: pointer; }
.shift-popover {
  position: absolute; z-index: 50; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px; box-shadow: var(--shadow); display: flex; gap: 8px;
}

/* ===== Stat blocks ===== */
.stat-row { display: flex; gap: 24px; flex-wrap: wrap; }
.stat { }
.stat .num { font-family: var(--font-display); font-size: 26px; font-weight: 700; }
.stat.accent .num { color: var(--accent); }
.stat.accent-2 .num { color: var(--accent-2); }
.stat .lbl { font-size: 12px; color: var(--text-muted); }

.category-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 10.5px; font-weight: 600;
  color: var(--cat-color, var(--text-muted));
  background: color-mix(in srgb, var(--cat-color, var(--text-muted)) 16%, transparent);
  padding: 2px 8px 2px 6px;
  border-radius: 999px;
}
.category-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cat-color, var(--text-muted)); flex-shrink: 0; }

.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: 360px; max-width: 100%; }
.login-brand { text-align: center; margin-bottom: 22px; }
.error-msg { color: var(--danger); font-size: 13px; margin-bottom: 12px; }
.success-msg { color: var(--accent); font-size: 13px; margin-bottom: 12px; }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }