/* ===== Design tokens ===== */
:root {
  --primary: #4c6ef5;
  --primary-dark: #3b5bdb;
  --success: #2f9e44;
  --warning: #f59f00;
  --danger: #e03131;
  --muted: #868e96;
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #212529;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
}

html.dark {
  --bg: #1a1b1e;
  --card-bg: #25262b;
  --text: #e9ecef;
  --text-muted: #adb5bd;
  --border: #373a40;
  --shadow: 0 1px 3px rgba(0,0,0,.3);
}

/* ===== Theme toggle ===== */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 20px;
  padding: .2rem .6rem;
  font-size: .8rem;
  cursor: pointer;
  margin-left: .75rem;
}
.theme-toggle:hover { background: var(--border); }

/* ===== Toasts ===== */
.global-spinner {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--primary);
  z-index: 2000;
  opacity: 0;
  transition: width .3s ease, opacity .3s ease;
}
.global-spinner.active {
  width: 100%;
  opacity: 1;
}
.btn.is-loading {
  opacity: .6;
  pointer-events: none;
}
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  pointer-events: none;
}
.toast {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: .75rem 1rem;
  border-radius: .5rem;
  box-shadow: var(--shadow);
  pointer-events: auto;
  min-width: 260px;
  max-width: 360px;
  animation: toast-in .25s ease;
  display: flex;
  align-items: flex-start;
  gap: .5rem;
}
.toast-text { flex: 1; }
.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 .15rem;
}
.toast-close:hover { color: var(--danger); }
.toast--danger { border-left: 3px solid var(--danger); }
.toast--warning { border-left: 3px solid var(--warning); }
.toast--success { border-left: 3px solid var(--success); }
.toast--info { border-left: 3px solid var(--primary); }
@keyframes toast-in { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ===== Base ===== */
* { box-sizing: border-box; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: .5rem 1rem;
  z-index: 3000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 0 0 .5rem; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ===== Header / Nav ===== */
.header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: .5rem;
  padding-bottom: .5rem;
  gap: .5rem;
}
.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.brand:hover { text-decoration: none; }

.nav-toggle {
  display: block;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1.2rem;
  padding: .25rem .5rem;
  cursor: pointer;
  color: var(--text);
}

.nav {
  display: none;
  width: 100%;
  flex-direction: column;
  gap: .25rem;
  padding-bottom: .5rem;
}
body.nav-open .nav { display: flex; }

.nav-link {
  padding: .5rem .75rem;
  border-radius: var(--radius);
  color: var(--text);
}
.nav-link:hover { background: var(--bg); text-decoration: none; }
.nav-link.active { background: var(--primary); color: #fff; }
.nav-logout { margin-top: .25rem; }

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .nav {
    display: flex !important;
    flex-direction: row;
    width: auto;
    align-items: center;
    gap: .25rem;
    padding-bottom: 0;
  }
  .nav-logout { margin-top: 0; margin-left: .5rem; }
}

/* ===== Main ===== */
.main { padding-top: 1.25rem; padding-bottom: 3rem; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1.25rem;
}
.page-header h1 { margin: 0; }

/* ===== Flash ===== */
.flash {
  padding: .65rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  border: 1px solid transparent;
}
.flash-success { background: #d3f9d8; color: #2b8a3e; border-color: #b2f2bb; }
.flash-danger  { background: #ffe3e3; color: #c92a2a; border-color: #ffc9c9; }
.flash-warning { background: #fff3bf; color: #997404; border-color: #ffec99; }
.flash-info    { background: #d0ebff; color: #1971c2; border-color: #a5d8ff; }

@media (prefers-color-scheme: dark) {
  .flash-success { background: #2b4433; color: #69db7c; border-color: #40c057; }
  .flash-danger  { background: #4d2020; color: #ff8787; border-color: #e03131; }
  .flash-warning { background: #4d4020; color: #ffd43b; border-color: #f59f00; }
  .flash-info    { background: #20334d; color: #74c0fc; border-color: #1971c2; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: .45rem .9rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  font-size: .9rem;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s;
}
.btn:hover { background: var(--bg); text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; }
.btn-outline { background: transparent; }
.btn-sm { padding: .25rem .6rem; font-size: .8rem; }
.btn-block { width: 100%; text-align: center; }

/* ===== Cards ===== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}
.auth-card { max-width: 420px; margin: 2rem auto; }
.form-card { max-width: 640px; }
.center-card { text-align: center; max-width: 420px; margin: 3rem auto; }
.empty-state { text-align: center; color: var(--text-muted); }

/* ===== Forms ===== */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: .3rem; font-weight: 500; font-size: .9rem; }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .5rem .7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: .95rem;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(76,110,245,.15);
}
.form-check label { font-weight: 400; display: flex; align-items: center; gap: .4rem; }
.form-row { display: grid; grid-template-columns: 1fr; gap: 0 1rem; }
@media (min-width: 576px) { .form-row { grid-template-columns: 1fr 1fr; } }
.form-actions { display: flex; gap: .5rem; margin-top: 1.25rem; }
.auth-links { text-align: center; margin-top: 1rem; font-size: .9rem; }
.tag-checkboxes { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag-check { display: flex; align-items: center; gap: .3rem; cursor: pointer; }

/* ===== Filters ===== */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.25rem;
}
.filters select {
  padding: .4rem .6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--text);
  font-size: .85rem;
}

/* ===== Sections ===== */
.section { margin-bottom: 1.5rem; }
.section-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: .5rem;
  padding-bottom: .3rem;
  border-bottom: 2px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: .5rem;
}
.section-title.section-danger { color: var(--danger); border-bottom-color: var(--danger); }
.section-more {
  font-size: .8rem;
  font-weight: 400;
  color: var(--text-muted);
}
.section-more:hover { color: var(--primary); text-decoration: none; }

/* ===== Task rows ===== */
.task-list { display: flex; flex-direction: column; gap: .5rem; }
.task-row {
  display: flex;
  align-items: flex-start;
  gap: .5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .6rem .75rem;
  box-shadow: var(--shadow);
}
.task-row.done { opacity: .55; }
.task-row.done .task-title a { text-decoration: line-through; }

.task-toggle-form { flex-shrink: 0; }
.task-check {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 .1rem;
  color: var(--primary);
  line-height: 1.3;
}

.task-body { flex: 1; min-width: 0; }
.task-title { font-weight: 500; word-break: break-word; }
.task-title a { color: var(--text); }
.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .6rem;
  margin-top: .25rem;
  font-size: .8rem;
  color: var(--text-muted);
}
.task-actions { display: flex; gap: .3rem; flex-shrink: 0; flex-wrap: wrap; }

/* ===== Badges / tags ===== */
.badge {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 500;
}
.badge-low { background: #d3f9d8; color: #2b8a3e; }
.badge-medium { background: #fff3bf; color: #997404; }
.badge-high { background: #ffe3e3; color: #c92a2a; }
.badge-progress { background: #d0ebff; color: #1971c2; }

.tag {
  display: inline-block;
  padding: .1rem .5rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 500;
}
.tag-lg { font-size: .9rem; padding: .25rem .75rem; }

.task-project { font-size: .8rem; }

/* ===== Subtasks ===== */
.subtasks { margin-top: .75rem; border-top: 1px dashed var(--border); padding-top: .5rem; }
.subtask-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .2rem 0;
}
.subtask-row.done .subtask-title { text-decoration: line-through; opacity: .6; }
.subtask-title { flex: 1; font-size: .9rem; }
.subtask-add-form {
  display: flex;
  gap: .4rem;
  margin-top: .4rem;
}
.subtask-add-form input[type="text"] {
  flex: 1;
  padding: .3rem .5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: .85rem;
}

/* ===== Comments ===== */
.comments { margin-top: .75rem; border-top: 1px dashed var(--border); padding-top: .5rem; }
.comment-form {
  display: flex;
  gap: .4rem;
  margin-top: .4rem;
}
.comment-form textarea {
  flex: 1;
  padding: .3rem .5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: .85rem;
  font-family: inherit;
  resize: vertical;
}
.comment-meta { font-size: .75rem; color: var(--text-muted); }
.comment-body { margin: .15rem 0 .5rem; }
.comment-delete-form { display: inline; margin-left: .35rem; }
.btn-sm-x {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: .85rem;
  line-height: 1;
  padding: 0 .15rem;
}
.btn-sm-x:hover { color: var(--danger); }

/* ===== Task view ===== */
.breadcrumbs {
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: .75rem;
}
.bc-sep { margin: 0 .3rem; }
.bc-current {
  color: var(--text);
  max-width: 40ch;
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: bottom;
}
.task-view-title { margin: 0 0 .25rem; word-break: break-word; }
.task-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin: .75rem 0;
}
.task-chips form { display: inline; }
.chip-status { cursor: pointer; border: none; font-size: inherit; }
.chip-meta { font-size: .85rem; color: var(--text-muted); }
.chip-meta.overdue { color: var(--danger); font-weight: 600; }
.badge-done { background: #d3f9d8; color: #2b8a3e; }
.badge-overdue { background: #ffe3e3; color: #c92a2a; }
.badge-overdue { animation: none; }
.view-desc {
  white-space: pre-wrap;
  margin: .75rem 0;
  line-height: 1.55;
}
.task-view-actions {
  display: flex;
  gap: .5rem;
  margin: 1rem 0;
  align-items: center;
}
.task-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.25rem;
}
.task-nav .btn { max-width: 45%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ===== Subtasks progress ===== */
.subtasks-progress { margin: .35rem 0 .5rem; }
.subtasks-count { font-size: .8rem; color: var(--text-muted); }
.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: .25rem;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--success);
  border-radius: 2px;
  transition: width .3s ease;
}

/* ===== Dropzone & thumbs ===== */
.dropzone {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  padding: .5rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.dropzone.dragover { border-color: var(--primary); background: rgba(76,110,245,.06); }
.dropzone-hint { font-size: .8rem; color: var(--text-muted); }
.attachment-thumb {
  width: 28px;
  height: 28px;
  object-fit: cover;
  border-radius: 4px;
  vertical-align: middle;
  margin-right: .35rem;
}

/* ===== Chips select ===== */
.chips-select {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}
.chip-select { cursor: pointer; }
.chip-select .tag, .chip-select .user-chip {
  display: inline-block;
  padding: .15rem .55rem;
  border-radius: 14px;
  font-size: .82rem;
  opacity: .45;
  border: 1px solid transparent;
  transition: opacity .15s ease;
}
.chip-select.selected .tag, .chip-select.selected .user-chip {
  opacity: 1;
  border-color: var(--primary);
}
.user-chip {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}

/* ===== Draft bar ===== */
.draft-bar {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .75rem;
  margin-bottom: 1rem;
  background: rgba(245,159,0,.1);
  border: 1px solid var(--warning);
  border-radius: var(--radius);
  font-size: .88rem;
}

/* ===== Log details ===== */
.log-details summary {
  cursor: pointer;
  font-size: .85rem;
  color: var(--text-muted);
  margin-top: .35rem;
}
.log-details summary:hover { color: var(--primary); }

/* ===== Attachments ===== */
.attachments { margin-top: .75rem; border-top: 1px dashed var(--border); padding-top: .5rem; }
.attachment-list { list-style: none; margin: 0 0 .5rem; padding: 0; }
.attachment-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .3rem 0;
  border-bottom: 1px solid var(--border);
}
.attachment-row:last-child { border-bottom: none; }
.attachment-name {
  flex: 1;
  min-width: 0;
  font-size: .88rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.attachment-size { font-size: .78rem; color: var(--text-muted); white-space: nowrap; }
.attachment-empty { font-size: .85rem; color: var(--text-muted); margin: 0 0 .5rem; }
.attachment-upload-form {
  display: flex;
  gap: .4rem;
  align-items: center;
  flex-wrap: wrap;
}
.attachment-upload-form input[type="file"] {
  flex: 1;
  min-width: 160px;
  font-size: .85rem;
  color: var(--text);
}

/* ===== Assignees ===== */
.task-assignees { display: inline-flex; gap: .15rem; vertical-align: middle; }
.assignee-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: .65rem;
  font-weight: 600;
  flex-shrink: 0;
}
.assignee-email { font-size: .82rem; color: var(--text-muted); }
.member-chips { display: flex; gap: .25rem; margin: .25rem 0 .5rem; flex-wrap: wrap; }
.form-hint { display: block; margin-top: .25rem; font-size: .78rem; color: var(--text-muted); }

/* ===== Task creator + log ===== */
.task-creator {
  margin: -.5rem 0 1rem;
  font-size: .82rem;
  color: var(--text-muted);
}
.task-log {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .35rem;
}
.log-entry {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .6rem;
  align-items: baseline;
  font-size: .85rem;
  padding: .3rem 0;
  border-bottom: 1px dashed var(--border);
}
.log-entry:last-child { border-bottom: none; }
.log-user { font-weight: 600; color: var(--text); }
.log-action { color: var(--text); flex: 1; min-width: 120px; }
.log-time { color: var(--text-muted); font-size: .78rem; white-space: nowrap; }

/* ===== Projects / tags grids ===== */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 576px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

.project-card { display: flex; flex-direction: column; gap: .5rem; }
.project-header { display: flex; align-items: center; gap: .5rem; }
.project-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.project-actions { display: flex; gap: .3rem; flex-wrap: wrap; }
.project-tasks-link { font-size: .85rem; }

.tag-list-page { display: flex; flex-direction: column; gap: .5rem; }
.tag-card { display: flex; justify-content: space-between; align-items: center; gap: .5rem; flex-wrap: wrap; }

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.25rem;
}
.page-info { font-size: .9rem; color: var(--text-muted); }
.page-num {
  display: inline-block;
  min-width: 2rem;
  padding: .2rem .5rem;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: .9rem;
}
.page-num:hover { background: var(--border); text-decoration: none; }
.page-num.current {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.results-count {
  font-size: .85rem;
  color: var(--text-muted);
  margin: .5rem 0;
}
.back-link {
  display: inline-block;
  margin-bottom: .5rem;
  font-size: .9rem;
  color: var(--text-muted);
}
.back-link:hover { color: var(--primary); }

/* ===== Calendar ===== */
.calendar-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.calendar-title { font-weight: 600; font-size: 1.1rem; }

.calendar { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.calendar-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.calendar-weekday {
  text-align: center;
  padding: .5rem .2rem;
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-muted);
}
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}
.calendar-day {
  min-height: 70px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: .3rem;
  font-size: .78rem;
}
.calendar-day:nth-child(7n) { border-right: none; }
.calendar-day.empty { background: var(--bg); opacity: .4; }
.calendar-day.today { background: rgba(76,110,245,.08); }
.calendar-day-number { font-weight: 600; margin-bottom: .15rem; }
.calendar-day.today .calendar-day-number { color: var(--primary); }
.calendar-day-add {
  color: var(--text);
  padding: 0 .2rem;
  border-radius: 4px;
}
.calendar-day-add:hover { background: var(--primary); color: #fff; text-decoration: none; }
.calendar-task-more {
  display: block;
  font-size: .68rem;
  color: var(--text-muted);
  padding: 0 .3rem;
}
.calendar-task-more:hover { color: var(--primary); text-decoration: none; }

.calendar-task {
  display: block;
  padding: .1rem .3rem;
  margin-bottom: .15rem;
  border-radius: 3px;
  border-left: 3px solid var(--primary);
  background: var(--bg);
  color: var(--text);
  font-size: .7rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.calendar-task:hover { background: var(--border); text-decoration: none; }

@media (max-width: 575px) {
  .calendar-day { min-height: 50px; font-size: .68rem; padding: .2rem; }
  .calendar-task { font-size: .6rem; }
}