:root {
  color-scheme: light dark;
  --bg: #fcf7f4;
  --card: #ffffff;
  --text: #1a1a1a;
  --heading: #000000;
  --muted: #6b6560;
  --border: #eee3dc;
  --border-strong: #d9cbc1;
  --accent: #e8892f;
  --accent-soft: rgba(232, 137, 47, 0.14);
  --on-accent: #1a1a1a;
  --dark-btn-bg: #111111;
  --dark-btn-text: #ffffff;
  --pill-high-bg: rgba(232, 137, 47, 0.18);
  --pill-high-text: #a85a12;
  --pill-low-bg: #f1ebe6;
  --pill-low-text: #6b6560;
  --overdue: #a85a12;
  --error: #c0392b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121216;
    --card: #1b1b21;
    --text: #efeae6;
    --heading: #ffffff;
    --muted: #a39d98;
    --border: #2a2a32;
    --border-strong: #3b3b45;
    --accent-soft: rgba(232, 137, 47, 0.18);
    --dark-btn-bg: #ffffff;
    --dark-btn-text: #111111;
    --pill-high-bg: rgba(232, 137, 47, 0.22);
    --pill-high-text: #f5a95e;
    --pill-low-bg: #2a2a32;
    --pill-low-text: #a39d98;
    --overdue: #f5a95e;
    --error: #ff8a7a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Poppins', sans-serif;
  line-height: 1.5;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: 'Archivo', sans-serif;
  font-weight: 900;
  color: var(--heading);
}

.hidden {
  display: none !important;
}

.muted {
  margin: 0;
  color: var(--muted);
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.7rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 12px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-block {
  width: 100%;
}

.btn-accent {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-dark {
  background: var(--dark-btn-bg);
  color: var(--dark-btn-text);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}

.user .btn-ghost {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.link-btn {
  padding: 0.3rem 0.6rem;
  background: none;
  border: none;
  border-radius: 8px;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
}

.link-btn:hover {
  background: var(--bg);
  color: var(--heading);
}

.link-btn.danger:hover {
  color: var(--error);
}

/* ---------- Auth screen ---------- */
.auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
}

.brand-title {
  font-size: 2rem;
  margin-bottom: 0.25rem;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
  margin: 1.5rem 0 1.25rem;
  padding: 0.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
}

.tab {
  padding: 0.5rem;
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
}

.tab.active {
  background: var(--card);
  color: var(--heading);
  box-shadow: 0 0 0 1px var(--border);
}

/* ---------- Form fields ---------- */
.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
}

.field textarea {
  min-height: 90px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: var(--accent);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

#auth-form[data-mode='login'] .register-only {
  display: none;
}

.form-error {
  min-height: 1.4rem;
  margin: 0 0 0.75rem;
  color: var(--error);
  font-size: 0.85rem;
}

/* ---------- App screen ---------- */
.app {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem 1rem;
  background: var(--card);
  border-right: 1px solid var(--border);
}

.brand {
  padding: 0 0.5rem;
  font-family: 'Archivo', sans-serif;
  font-weight: 900;
  font-size: 1.3rem;
  color: var(--heading);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-link {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0.8rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
}

.nav-link.active {
  background: var(--accent-soft);
  color: var(--heading);
}

.count {
  min-width: 1.5rem;
  padding: 0 0.45rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
}

.user {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 14px;
}

.avatar {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  background: var(--accent);
  border-radius: 50%;
  color: var(--on-accent);
  font-weight: 600;
}

.user-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  font-size: 0.8rem;
  line-height: 1.3;
}

.user-info strong,
.user-info span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-info span {
  color: var(--muted);
}

.user .btn-ghost {
  width: 100%;
}

.main {
  width: 100%;
  max-width: 900px;
  padding: 2rem;
}

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-head h2 {
  font-size: 2rem;
}

.banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  background: var(--card);
  border: 1px solid var(--error);
  border-radius: 14px;
  color: var(--error);
  font-size: 0.9rem;
}

.loading {
  padding: 1rem 0;
}

/* ---------- Task groups and rows ---------- */
.group {
  margin-bottom: 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}

.group-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1.25rem;
}

.group-head h3 {
  font-size: 1rem;
}

.task-row {
  display: grid;
  grid-template-columns: 24px 1fr auto auto;
  align-items: center;
  gap: 0.9rem;
  padding: 0.9rem 1.25rem;
  border-top: 1px solid var(--border);
}

.check {
  position: relative;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  padding: 0;
  background: transparent;
  border: 2px solid var(--border-strong);
  border-radius: 50%;
  cursor: pointer;
}

/* Bigger invisible tap area for phones */
.check::before {
  content: '';
  position: absolute;
  inset: -10px;
}

.check.checked {
  background: var(--accent);
  border-color: var(--accent);
}

.check.checked::after {
  content: '\2713';
  color: var(--on-accent);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
}

.task-title {
  font-weight: 500;
  word-break: break-word;
}

.task-row.is-done .task-title {
  color: var(--muted);
  text-decoration: line-through;
}

.task-desc {
  color: var(--muted);
  font-size: 0.85rem;
  white-space: pre-line;
  word-break: break-word;
}

.task-meta {
  color: var(--muted);
  font-size: 0.8rem;
}

.task-meta.overdue {
  color: var(--overdue);
  font-weight: 600;
}

.task-actions {
  display: flex;
  gap: 0.1rem;
}

.pill {
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.pill-high {
  background: var(--pill-high-bg);
  color: var(--pill-high-text);
}

.pill-medium {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text);
}

.pill-low {
  background: var(--pill-low-bg);
  color: var(--pill-low-text);
}

.empty {
  margin: 0;
  padding: 0.9rem 1.25rem 1.1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- Popup ---------- */
dialog {
  width: min(480px, calc(100% - 2rem));
  padding: 1.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text);
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

dialog h2 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* ---------- Phone ---------- */
@media (max-width: 800px) {
  .app {
    display: block;
  }

  .sidebar {
    position: static;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .brand {
    padding: 0;
  }

  .user {
    order: 2;
    margin-top: 0;
    flex-wrap: nowrap;
    padding: 0;
    border: none;
  }

  .user-info {
    display: none;
  }

  .user .btn-ghost {
    width: auto;
  }

  .nav {
    order: 3;
    width: 100%;
    flex-direction: row;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
  }

  .nav-link {
    width: auto;
    flex-shrink: 0;
    gap: 0.5rem;
    white-space: nowrap;
    border-color: var(--border);
    border-radius: 999px;
  }

  .nav-link.active {
    border-color: var(--accent);
  }

  .main {
    padding: 1rem;
  }

  .page-head h2 {
    font-size: 1.6rem;
  }

  .group-head {
    padding: 0.9rem 1rem;
  }

  .task-row {
    grid-template-columns: 24px 1fr auto;
    align-items: start;
    padding: 0.8rem 1rem;
  }

  .task-actions {
    grid-column: 2 / -1;
    margin-left: -0.6rem;
  }

  .link-btn {
    padding: 0.45rem 0.7rem;
  }
}

@media (max-width: 420px) {
  .field-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}