:root {
  --border: #d9dce1;
  --text: #1f2328;
  --muted: #6b7280;

  /* Blue */
  --blue: #1976D2;
  --blue-dark: #125295;
  --blue-tint: #E3F2FD;
  --blue-tint-strong: #BBDEFB;
  --blue-bg: #98C1EB;

  /* Yellow */
  --yellow: #FFC107;
  --yellow-dark: #e3ac0a;
  --yellow-tint: #FFF8E1;
  --yellow-bg: #FFE38F;

  /* Red */
  --red: #D32F2F;
  --red-dark: #a02323;
  --red-tint: #FDECEA;
  --red-bg: #EBA1A1;

  --radius: 6px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  line-height: 1.5;

  background-color: var(--blue-bg);
  background-image: linear-gradient(
    135deg,
    var(--red-bg),
    var(--red-bg) 33%,
    var(--yellow-bg) 33%,
    var(--yellow-bg) 66%,
    var(--blue-bg) 66%,
    var(--blue-bg)
  );
  background-attachment: fixed;
  min-height: 100vh;
  padding: 32px 20px;
}

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

/* ---------------- Page layout ---------------- */

.page-wrap {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ---------------- Banner ---------------- */

.banner {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.28);
}

.banner-inner {
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.banner-logo {
  display: flex;
  align-items: center;
  gap: 20px;
  font-weight: 700;
  font-size: 30px;
  color: var(--text);
}

.banner-logo span {
  background-image: linear-gradient(
    to right,
    var(--red-dark),
    var(--red-dark) 25%,
    var(--yellow-dark) 25%,
    var(--yellow-dark) 50%,
    var(--blue-dark) 50%,
    var(--blue-dark) 75%,
    var(--red-dark) 75%,
    var(--red-dark)
  );
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.logo-mark {
  height: 50px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  line-height: 1;
}

.banner-nav {
  display: flex;
  gap: 18px;
  margin-left: auto;
}

.banner-nav a {
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
}

.banner-nav a:hover { color: var(--blue); text-decoration: none; }

.banner-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------------- Content shell ---------------- */

.app-shell {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.32);
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 28px 20px 56px;
}

/* ---------------- Layout helpers ---------------- */

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.page-header h1 { margin: 0; font-size: 22px; }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.form-narrow { max-width: 380px; }

/* ---------------- Forms ---------------- */

form label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin: 14px 0 4px;
}

form label:first-child { margin-top: 0; }

input[type="text"],
input[type="password"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="date"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-tint);
}

textarea { resize: vertical; }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: normal;
  margin-top: 14px;
}

.checkbox-row.inline { display: inline-flex; margin: 0; }

.checkbox-row input { width: auto; }

.hint { font-size: 13px; color: var(--muted); margin: 6px 0 0; }

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.inline-form {
  display: flex;
  gap: 8px;
  align-items: center;
}
.inline-form select { width: auto; min-width: 180px; }

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover { text-decoration: none; background: #f3f4f6; }

.btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--blue-dark); border-color: var(--blue-dark); }

.btn-secondary {
  background: #fff;
  border-color: var(--blue);
  color: var(--blue);
}
.btn-secondary:hover { background: var(--blue-tint); }

.btn-danger {
  background: #fff;
  border-color: var(--red);
  color: var(--red);
}

.btn-danger:hover { background: var(--red-tint); }

.btn-plain {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
}
.btn-plain:hover { background: #f3f4f6; }

.btn-block { width: 100%; margin-top: 18px; }

/* ---------------- Auth page ---------------- */

.auth-wrap {
  display: flex;
  justify-content: center;
  padding: 32px 0 24px;
}

.auth-card { width: 100%; max-width: 340px; }
.auth-card h1 { font-size: 20px; margin: 0 0 4px; }

/* ---------------- Tables ---------------- */

.task-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.task-table th,
.task-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.task-table th {
  background: #f3f4f6;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.task-table tr:last-child td { border-bottom: none; }
.task-table tr:hover td { background: var(--blue-tint); }

/* ---------------- Filter bar ---------------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 18px;
}

.filter-bar select { width: auto; }



/* ---------------- Multi-select filter dropdowns ---------------- */

.filter-dropdown {
  position: relative;
}

.filter-dropdown summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  font-size: 14px;
  color: var(--text);
  user-select: none;
}

.filter-dropdown summary::-webkit-details-marker { display: none; }

.filter-dropdown summary::after {
  content: "▾";
  font-size: 11px;
  color: var(--muted);
}

.filter-dropdown[open] summary {
  border-color: var(--blue);
}

.filter-dropdown-panel {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 20;
  min-width: 180px;
  max-height: 220px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.16);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.filter-dropdown-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}

.filter-dropdown-option:hover { background: var(--blue-tint); }

.filter-dropdown-option input { margin: 0; }

.filter-bar select { width: auto; }

/* ---------------- Status badges ---------------- */

.status-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: capitalize;
  white-space: nowrap;
}

.status-open { background: var(--yellow-tint); color: var(--yellow-dark); border: 1px solid var(--yellow); }
.status-in_progress { background: var(--blue-tint); color: var(--blue); border: 1px solid var(--blue); }
.status-completed { background: var(--red-tint); color: var(--red-dark); border: 1px solid var(--red); }

/* ---------------- Deadlines & overdue emphasis ---------------- */

.deadline-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.deadline-tag-overdue { background: var(--red-tint); color: var(--red-dark); border: 1px solid var(--red); }
.deadline-tag-soon { background: var(--yellow-tint); color: var(--yellow-dark); border: 1px solid var(--yellow); }

.task-row-overdue td {
  background: var(--red-tint);
}
.task-row-overdue:hover td {
  background: var(--red-tint);
  filter: brightness(0.97);
}

.banner-alert {
  margin: 0 0 14px;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
}

.banner-alert-overdue {
  background: var(--red-tint);
  color: var(--red-dark);
  border: 1px solid var(--red);
}

/* ---------------- Calendar ---------------- */

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.calendar-nav h2 {
  margin: 0;
  font-size: 18px;
}

.calendar-card { padding: 0; overflow: hidden; }

.calendar-grid {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.calendar-grid th {
  background: #f3f4f6;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  padding: 8px 6px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.calendar-day {
  vertical-align: top;
  border: 1px solid var(--border);
  padding: 6px;
  height: 92px;
  width: 14.28%;
}

.calendar-day-empty { background: #f9fafb; }

.calendar-day-today {
  background: var(--blue-tint);
  box-shadow: inset 0 0 0 2px var(--blue);
}

.calendar-day-number {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 4px;
}

.calendar-day-today .calendar-day-number { color: var(--blue-dark); }

.calendar-task {
  display: block;
  font-size: 11px;
  line-height: 1.3;
  padding: 2px 5px;
  margin-bottom: 3px;
  border-radius: 4px;
  background: var(--blue-tint);
  color: var(--blue-dark);
  border: 1px solid var(--blue-tint-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.calendar-task:hover { text-decoration: none; filter: brightness(0.95); }

.calendar-task-overdue {
  background: var(--red-tint);
  color: var(--red-dark);
  border-color: var(--red);
  font-weight: 700;
}

.calendar-task-soon {
  background: var(--yellow-tint);
  color: var(--yellow-dark);
  border-color: var(--yellow);
}

.calendar-task-done {
  background: #f3f4f6;
  color: var(--muted);
  border-color: var(--border);
  text-decoration: line-through;
}

.calendar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
  align-items: center;
}

.legend-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  margin-right: 5px;
  vertical-align: middle;
}

.legend-swatch-overdue { background: var(--red); }
.legend-swatch-soon { background: var(--yellow); }
.legend-swatch-done { background: var(--muted); }
.legend-swatch-normal { background: var(--blue); }

/* ---------------- Task detail ---------------- */

.task-meta dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  row-gap: 8px;
  column-gap: 12px;
  margin: 0;
}

.task-meta dt { font-weight: 600; color: var(--muted); font-size: 13px; }
.task-meta dd { margin: 0; font-size: 14px; }

.task-description {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  white-space: pre-wrap;
  font-size: 14px;
}

.task-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.muted { color: var(--muted); font-weight: normal; }

/* ---------------- Task chat ---------------- */

.chat-thread {
  max-height: 340px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 4px;
}

.chat-message {
  align-self: flex-start;
  max-width: 80%;
  background: #f3f4f6;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
}

.chat-message-own {
  align-self: flex-end;
  background: var(--blue-tint);
  border-color: var(--blue-tint-strong);
}

.chat-message-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 2px;
}

.chat-message-author { font-weight: 600; }

.chat-message-body {
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-form {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  margin-top: 12px;
}

.chat-form textarea {
  flex: 1;
  resize: vertical;
}

/* ---------------- Flash messages ---------------- */

.flashes {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.flash {
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 8px;
  font-size: 14px;
  border: 1px solid transparent;
}

.flash-success { background: var(--blue-tint); color: var(--blue-dark); border-color: var(--blue); }
.flash-error { background: var(--red-tint); color: var(--red-dark); border-color: var(--red); }
.flash-info { background: var(--yellow-tint); color: var(--yellow-dark); border-color: var(--yellow); }

.empty-state { color: var(--muted); }

/* ---------------- Small screens ---------------- */

@media (max-width: 600px) {
  body { padding: 16px 10px; }
  .app-shell, .banner { border-radius: 10px; }
  .banner-nav { margin-left: 0; }
}

/* ---------------- Dark mode ---------------- */

@media (prefers-color-scheme: dark) {
  :root {
    --border: #1f1f20;
    --text: #c2d2e4;
    --muted: #6b7280;

    /* Blue */
    --blue: #1976D2;
    --blue-dark: #125295;
    --blue-tint: #E3F2FD;
    --blue-tint-strong: #BBDEFB;
    --blue-bg: #05182a;

    /* Yellow */
    --yellow: #FFC107;
    --yellow-dark: #e3ac0a;
    --yellow-tint: #FFF8E1;
    --yellow-bg: #342700;

    /* Red */
    --red: #D32F2F;
    --red-dark: #a02323;
    --red-tint: #FDECEA;
    --red-bg: #2b0909;
  }

  .banner {
    background: #121212;
  }

  .task-table {
    background: #232323;
  }
  .app-shell {
    background: #121212;
  }

  input[type="text"],
  input[type="password"],
  input[type="date"],
  select,
  textarea {
    background: #232323;
  }

  input[type="text"]:focus,
  input[type="password"]:focus,
  input[type="date"]:focus,
  select:focus,
  textarea:focus {
    outline: none;
    border-color: var(--blue-dark);
    box-shadow: 0 0 0 3px var(--blue-bg);
  }

  .task-table th {
    background: #232323;
  }

  .task-table tr:hover td { background: #2d353e; }

  .task-row-overdue td { background: var(--red-bg); }
  .task-row-overdue:hover td { background: var(--red-bg); filter: brightness(1.1); }

  .calendar-grid th { background: #232323; }
  .calendar-day-empty { background: #191919; }
  .calendar-day-today { background: var(--blue-bg); }
  .calendar-task-done { background: #232323; }

  .filter-dropdown summary { background: #232323; color: var(--text); }
  .filter-dropdown-panel { background: #232323; }
  .filter-dropdown-option:hover { background: #2d353e; }



  .card {
    background: #151515;
  }

  .banner-alert-overdue {
    background: var(--red-bg);
    color: var(--red-dark);
    border: 1px solid var(--red);
  }

  .flash-success { background: var(--blue-bg); color: var(--blue-tint); border-color: var(--blue); }
  .flash-error { background: var(--red-bg); color: var(--red-tint); border-color: var(--red); }
  .flash-info { background: var(--yellow-bg); color: var(--yellow-tint); border-color: var(--yellow); }

  .btn {
    display: inline-block;
    padding: 8px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: #121212;
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
  }

  .btn:hover { text-decoration: none; background: #f3f4f6; }

  .btn-primary {
    background: var(--blue-dark);
    border-color: var(--blue-dark);
    color: #121212;
  }
  .btn-primary:hover { background: var(--blue); border-color: var(--blue); }

  .btn-secondary {
    background: #121212;
    border-color: var(--blue-dark);
    color: var(--blue-dark);
  }
  .btn-secondary:hover { background: var(--blue-bg); }

  .btn-danger {
    background: #121212;
    border-color: var(--red-dark);
    color: var(--red-dark);
  }
  .btn-danger:hover { background: var(--red-bg); }

  .btn-plain {
    background: transparent;
    border-color: transparent;
    color: var(--muted);
  }
  .btn-plain:hover { background: #2d353e; }

  .status-completed { background: var(--red-bg); color: var(--red); border: 1px solid var(--red); }
  .status-in_progress { background: var(--blue-bg); color: var(--blue); border: 1px solid var(--blue); }
  .status-open { background: var(--yellow-bg); color: var(--yellow-dark); border: 1px solid var(--yellow-dark); }

  .chat-message { background: #1c1c1c; border-color: var(--border); }
  .chat-message-own { background: var(--blue-bg); border-color: var(--blue-dark); }
}