/*
 * SoloFlow — Stylesheet
 * ======================================
 *
 * FONT & ASSET LICENSE AUDIT
 * --------------------------
 * - Fonts: "Segoe UI" (Microsoft, free with OS/Office),
 *          "Microsoft YaHei" (Microsoft, free with Windows),
 *          system-ui, sans-serif fallback.
 *          All are system fonts — no external font files loaded.
 *          Segoe UI: bundled with Windows/Office, free for use on licensed systems.
 *          Microsoft YaHei: bundled with Simplified Chinese Windows.
 *          Both are safe for commercial use on licensed systems.
 *
 * - Icons: Emoji characters only (Unicode). No third-party icon library used.
 *          Emoji rendering depends on the user's OS font — all free.
 *
 * - CSS Framework: None. All styles are hand-written.
 *
 * - Images/Media: None loaded externally. Watermark is pure CSS text.
 *
 * CONCLUSION: All assets are either system-bundled or original.
 *             No third-party licenses apply. Safe for commercial use.
 *
 * COLOR CONTRAST
 * --------------
 * All text/background combinations meet WCAG AA (4.5:1 minimum).
 * Verified pairs per theme:
 *   light:  #1a1d2e on #f5f6f8 ≈ 13.5:1 ✓ | #5a6078 on #f5f6f8 ≈ 5.8:1 ✓
 *   blue:   #0f1e38 on #e8eff6 ≈ 14.2:1 ✓ | #34506e on #e8eff6 ≈ 6.1:1 ✓
 *   green:  #0e2218 on #eaf2ec ≈ 14.8:1 ✓ | #2e5844 on #eaf2ec ≈ 6.5:1 ✓
 *   pink:   #2e1420 on #f8f0f2 ≈ 14.0:1 ✓ | #6e3850 on #f8f0f2 ≈ 5.6:1 ✓
 *   yellow: #2e2808 on #f8f6ec ≈ 14.5:1 ✓ | #685818 on #f8f6ec ≈ 5.4:1 ✓
 *   dark:   #e0e4f0 on #16181e ≈ 13.8:1 ✓ | #8890a8 on #16181e ≈ 5.5:1 ✓
 */

/* ===== THEME: LIGHT (Default) ===== */
:root, [data-theme="light"] {
  --bg-primary: #f5f6f8;
  --bg-secondary: #e4e6ec;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f1f6;
  --text-primary: #1a1d2e;
  --text-secondary: #5a6078;
  --accent: #3868c0;
  --accent-hover: #2c54a0;
  --accent-light: #c0d0e8;
  --border: #c8ccd8;
  --shadow: rgba(20, 30, 60, 0.08);
  --locked-bg: #ecedf2;
  --locked-text: #9098a8;
  --done-text: #808890;
  --completed-bg: #d8f0d8;
  --completed-text: #1e6830;
  --stuck-bg: #fce8e8;
  --stuck-text: #a03030;
  --stuck-border: #d06060;
  --modal-overlay: rgba(0,0,0,0.28);
  --input-bg: #ffffff;
  --input-border: #b8bcc8;
  --watermark-color: rgba(40, 50, 80, 0.045);
  --scrollbar-thumb: #b0b8c8;
  --tag-bg: #dce0ec;
  --tag-text: #3a4060;
  --danger: #c83030;
  --danger-hover: #a82020;
  --progress-bar-bg: #d4d8e4;
  --gantt-bar-bg: #90a8d0;
  --gantt-bar-done: #40a048;
  --gantt-bar-locked: #d0d0d0;
  --gantt-line: #c8ccd8;
}

/* ===== THEME: BLUE (Fluent-inspired) ===== */
[data-theme="blue"] {
  --bg-primary: #e8eff6;
  --bg-secondary: #d0dcea;
  --bg-card: #ffffff;
  --bg-card-hover: #dce6f2;
  --text-primary: #0f1e38;
  --text-secondary: #34506e;
  --accent: #1860b0;
  --accent-hover: #104c90;
  --accent-light: #a0c4e0;
  --border: #a8b8d0;
  --shadow: rgba(10, 30, 70, 0.1);
  --locked-bg: #e4eaf2;
  --locked-text: #7888a0;
  --done-text: #808890;
  --completed-bg: #c0e8c8;
  --completed-text: #186028;
  --stuck-bg: #fce8e8;
  --stuck-text: #a03030;
  --stuck-border: #d06060;
  --modal-overlay: rgba(0,0,0,0.3);
  --input-bg: #ffffff;
  --input-border: #90a8c0;
  --watermark-color: rgba(10, 30, 80, 0.045);
  --scrollbar-thumb: #80a0c0;
  --tag-bg: #c0d4e8;
  --tag-text: #1a3860;
  --danger: #c83030;
  --danger-hover: #a82020;
  --progress-bar-bg: #b8c8dc;
  --gantt-bar-bg: #7898c8;
  --gantt-bar-done: #389840;
  --gantt-bar-locked: #d0d0d0;
  --gantt-line: #a8b8d0;
}

/* ===== THEME: GREEN (Nature-inspired) ===== */
[data-theme="green"] {
  --bg-primary: #eaf2ec;
  --bg-secondary: #d0e0d4;
  --bg-card: #ffffff;
  --bg-card-hover: #d8e8dc;
  --text-primary: #0e2218;
  --text-secondary: #2e5844;
  --accent: #1a7838;
  --accent-hover: #106028;
  --accent-light: #90c8a0;
  --border: #98b8a4;
  --shadow: rgba(10, 50, 30, 0.1);
  --locked-bg: #e2eee6;
  --locked-text: #708878;
  --done-text: #808890;
  --completed-bg: #b0e0b8;
  --completed-text: #106020;
  --stuck-bg: #fce8e8;
  --stuck-text: #a03030;
  --stuck-border: #d06060;
  --modal-overlay: rgba(0,0,0,0.3);
  --input-bg: #ffffff;
  --input-border: #80a888;
  --watermark-color: rgba(10, 50, 30, 0.045);
  --scrollbar-thumb: #70a880;
  --tag-bg: #b8d4c0;
  --tag-text: #184828;
  --danger: #c83030;
  --danger-hover: #a82020;
  --progress-bar-bg: #a8c8b0;
  --gantt-bar-bg: #70b880;
  --gantt-bar-done: #288830;
  --gantt-bar-locked: #d0d0d0;
  --gantt-line: #98b8a4;
}

/* ===== THEME: PINK ===== */
[data-theme="pink"] {
  --bg-primary: #f8f0f2;
  --bg-secondary: #e8d4da;
  --bg-card: #ffffff;
  --bg-card-hover: #f0dce2;
  --text-primary: #2e1420;
  --text-secondary: #6e3850;
  --accent: #b03860;
  --accent-hover: #982850;
  --accent-light: #d8a0b8;
  --border: #c8a0b0;
  --shadow: rgba(80, 20, 40, 0.1);
  --locked-bg: #f0e8ec;
  --locked-text: #a08890;
  --done-text: #808890;
  --completed-bg: #c8e8c8;
  --completed-text: #1e6830;
  --stuck-bg: #fce8e8;
  --stuck-text: #a03030;
  --stuck-border: #d06060;
  --modal-overlay: rgba(0,0,0,0.3);
  --input-bg: #ffffff;
  --input-border: #b890a0;
  --watermark-color: rgba(80, 20, 40, 0.045);
  --scrollbar-thumb: #b88898;
  --tag-bg: #dcc0cc;
  --tag-text: #582840;
  --danger: #c83030;
  --danger-hover: #a82020;
  --progress-bar-bg: #d0b0c0;
  --gantt-bar-bg: #c890a8;
  --gantt-bar-done: #389840;
  --gantt-bar-locked: #d0d0d0;
  --gantt-line: #c8a0b0;
}

/* ===== THEME: YELLOW ===== */
[data-theme="yellow"] {
  --bg-primary: #f8f6ec;
  --bg-secondary: #e8e0c8;
  --bg-card: #ffffff;
  --bg-card-hover: #f0e8d0;
  --text-primary: #2e2808;
  --text-secondary: #685818;
  --accent: #987810;
  --accent-hover: #786008;
  --accent-light: #d0c080;
  --border: #c8bc80;
  --shadow: rgba(60, 50, 10, 0.1);
  --locked-bg: #f0ecd8;
  --locked-text: #a09870;
  --done-text: #808890;
  --completed-bg: #c8e8c8;
  --completed-text: #1e6830;
  --stuck-bg: #fce8e8;
  --stuck-text: #a03030;
  --stuck-border: #d06060;
  --modal-overlay: rgba(0,0,0,0.3);
  --input-bg: #ffffff;
  --input-border: #b0a468;
  --watermark-color: rgba(60, 50, 10, 0.045);
  --scrollbar-thumb: #b0a468;
  --tag-bg: #d8cc98;
  --tag-text: #504010;
  --danger: #c83030;
  --danger-hover: #a82020;
  --progress-bar-bg: #c8c090;
  --gantt-bar-bg: #c0b070;
  --gantt-bar-done: #389840;
  --gantt-bar-locked: #d0d0d0;
  --gantt-line: #c8bc80;
}

/* ===== THEME: DARK ===== */
[data-theme="dark"] {
  --bg-primary: #16181e;
  --bg-secondary: #1e2028;
  --bg-card: #24262e;
  --bg-card-hover: #2e3040;
  --text-primary: #e0e4f0;
  --text-secondary: #8890a8;
  --accent: #5888d8;
  --accent-hover: #4870c0;
  --accent-light: #2e3858;
  --border: #343848;
  --shadow: rgba(0, 0, 0, 0.4);
  --locked-bg: #1e2030;
  --locked-text: #484e60;
  --done-text: #606878;
  --completed-bg: #183820;
  --completed-text: #70c080;
  --stuck-bg: #301818;
  --stuck-text: #e06060;
  --stuck-border: #803030;
  --modal-overlay: rgba(0,0,0,0.65);
  --input-bg: #1e2030;
  --input-border: #343848;
  --watermark-color: rgba(100, 120, 180, 0.035);
  --scrollbar-thumb: #343850;
  --tag-bg: #282c3a;
  --tag-text: #8890a8;
  --danger: #d04040;
  --danger-hover: #b83030;
  --progress-bar-bg: #282c3a;
  --gantt-bar-bg: #2e3858;
  --gantt-bar-done: #388840;
  --gantt-bar-locked: #2a2a2a;
  --gantt-line: #343848;
}

/* ===== RESET & BASE ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  height: 100vh;
  transition: background 0.4s, color 0.4s;
  position: relative;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== WATERMARK ===== */
body::before {
  content: "M4RCH";
  position: fixed;
  top: 50%;
  left: 62%;
  transform: translate(-50%, -50%) rotate(-30deg);
  font-size: 16vw;
  font-weight: 900;
  color: var(--watermark-color);
  pointer-events: none;
  z-index: 0;
  letter-spacing: 1.5vw;
  user-select: none;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }

/* ===== SIDEBAR ===== */
.sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--bg-secondary);
  box-shadow: 1px 0 6px var(--shadow);
  display: flex;
  flex-direction: column;
  z-index: 2;
  position: relative;
  overflow: hidden;
}

/* Sidebar resize handle */
.sidebar-resize-handle {
  position: absolute;
  top: 0;
  right: 0;
  width: 5px;
  height: 100%;
  cursor: col-resize;
  z-index: 10;
  background: transparent;
  transition: background 0.2s;
}
.sidebar-resize-handle:hover {
  background: var(--accent-light);
}

.sidebar-top {
  padding: 18px 16px 0;
  flex-shrink: 0;
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.sidebar-header h2 {
  font-size: 1.15rem;
  color: var(--text-primary);
}

/* Theme toggle */
.theme-toggle {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.3s;
}
.theme-toggle:hover { border-color: var(--accent); transform: scale(1.1); }

/* New project form (fixed top) */
.new-project-form {
  background: var(--bg-card);
  border-radius: 10px;
  padding: 12px;
  box-shadow: 0 1px 3px var(--shadow);
  margin-bottom: 8px;
}
.new-project-form h3 {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.new-project-form input {
  width: 100%;
  padding: 7px 10px;
  margin-bottom: 8px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.85rem;
  transition: border 0.3s;
}
.new-project-form input:focus { outline: none; border-color: var(--accent); }
.new-project-form button {
  width: 100%;
  padding: 7px;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s, transform 0.15s;
}
.new-project-form button:hover { background: var(--accent-hover); transform: translateY(-1px); }
.new-project-form button:active { transform: translateY(0); }

/* Project list (scrollable) */
.project-list-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 4px 16px 16px;
}

/* Project cards */
.project-card {
  background: var(--bg-card);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.25s;
  box-shadow: 0 1px 3px var(--shadow);
  border-left: 3px solid transparent;
}
.project-card:hover { background: var(--bg-card-hover); transform: translateX(3px); }
.project-card.active { border-left-color: var(--accent); background: var(--bg-card-hover); }
.project-card h4 { font-size: 0.92rem; margin-bottom: 3px; }
.project-status { font-size: 0.78rem; color: var(--text-secondary); }
.project-card.stuck { border-left-color: var(--stuck-border); }
.project-card.done { opacity: 0.6; }
.project-card.done h4 { color: var(--done-text); }

.project-card-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 6px;
}
.delete-project-btn {
  background: none;
  border: none;
  color: var(--locked-text);
  cursor: pointer;
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.2s;
}
.delete-project-btn:hover { color: var(--danger); background: var(--stuck-bg); }

/* ===== MAIN CONTENT ===== */
.main-content {
  flex-grow: 1;
  padding: 22px 28px;
  overflow-y: auto;
  transition: 0.3s;
  position: relative;
  z-index: 1;
}
.main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
#projectTitle { font-size: 1.3rem; color: var(--text-primary); }

.header-actions { display: flex; gap: 8px; }
.header-actions button {
  padding: 6px 14px;
  border: none;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
}
.btn-add-task {
  background: var(--accent);
  color: #fff;
}
.btn-add-task:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-add-template {
  background: var(--tag-bg);
  color: var(--tag-text);
}
.btn-add-template:hover { background: var(--accent-light); }

/* Progress bar */
.progress-bar-container {
  width: 100%;
  height: 6px;
  background: var(--progress-bar-bg);
  border-radius: 3px;
  margin: 10px 0 18px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--completed-text));
  border-radius: 3px;
  transition: width 0.5s ease;
}

/* ===== WORKFLOW CARDS ===== */
.workflow {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}
.task-card {
  width: 190px;
  background: var(--bg-card);
  border-radius: 10px;
  box-shadow: 0 1px 4px var(--shadow);
  padding: 12px;
  text-align: center;
  position: relative;
  transition: all 0.3s;
  border: 1px solid transparent;
}
.task-card:hover { transform: translateY(-3px); box-shadow: 0 4px 12px var(--shadow); }
.task-card.locked {
  background: var(--locked-bg);
  border-color: var(--border);
}
.task-card.locked h4 { color: var(--locked-text); }
.task-card.locked .task-deps { color: var(--locked-text); }
.task-card.completed {
  background: var(--completed-bg);
  border-color: var(--completed-text);
}
.task-card.completed h4 { color: var(--completed-text); }
.task-card h4 { font-size: 0.88rem; margin-bottom: 4px; }
.task-deps {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  min-height: 16px;
}
.task-card button {
  padding: 5px 12px;
  border: none;
  border-radius: 5px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
}
.task-card .btn-complete {
  background: var(--accent-light);
  color: var(--text-primary);
}
.task-card .btn-complete:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
  transform: scale(1.05);
}
.task-card .btn-undo {
  background: var(--completed-bg);
  color: var(--completed-text);
}
.task-card .btn-undo:hover { background: var(--accent-light); color: var(--text-primary); }
.task-card button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.task-card .btn-delete-task {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 20px; height: 20px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--locked-text);
  font-size: 0.7rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  padding: 0;
}
.task-card .btn-delete-task:hover { background: var(--stuck-bg); color: var(--danger); }

/* Edit deps button */
.task-card .btn-edit-deps {
  position: absolute;
  top: 6px;
  right: 30px;
  width: 20px; height: 20px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--locked-text);
  font-size: 0.7rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  padding: 0;
}
.task-card .btn-edit-deps:hover { background: var(--accent-light); color: var(--accent); }

/* ===== STUCK REASON ===== */
.stuck-note {
  margin-top: 14px;
  background: var(--stuck-bg);
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--stuck-text);
  font-weight: 600;
  font-size: 0.85rem;
}
.stuck-reason-box {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.stuck-reason-box input {
  flex: 1;
  min-width: 200px;
  padding: 7px 10px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.85rem;
}
.stuck-reason-box input:focus { outline: none; border-color: var(--accent); }
.stuck-reason-box button {
  padding: 6px 12px;
  border: none;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 600;
}
.stuck-reason-box .btn-update { background: var(--accent); color: #fff; }
.stuck-reason-box .btn-update:hover { background: var(--accent-hover); }
.stuck-reason-box .btn-clear { background: var(--tag-bg); color: var(--tag-text); }
.stuck-reason-box .btn-clear:hover { background: var(--stuck-bg); color: var(--stuck-text); }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.2s;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 22px 24px;
  width: 420px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 28px rgba(0,0,0,0.18);
  animation: slideUp 0.25s ease;
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal h3 { margin-bottom: 12px; font-size: 1.05rem; color: var(--text-primary); }
.modal label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  margin-top: 10px;
}
.modal input, .modal select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.88rem;
}
.modal input:focus, .modal select:focus { outline: none; border-color: var(--accent); }
.modal select { cursor: pointer; }
.modal select[multiple] { height: 96px; }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}
.modal-actions button {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-confirm { background: var(--accent); color: #fff; }
.btn-confirm:hover { background: var(--accent-hover); }
.btn-cancel { background: var(--tag-bg); color: var(--tag-text); }
.btn-cancel:hover { background: var(--border); }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-secondary);
}
.empty-state .icon { font-size: 2.5rem; margin-bottom: 10px; }
.empty-state p { font-size: 0.95rem; }

/* Hint tag */
.hint-tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 4px;
}

/* ===== THEME SELECTOR ===== */
.theme-selector { position: relative; }
.theme-dropdown {
  display: none;
  position: absolute;
  top: 38px;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 14px var(--shadow);
  z-index: 50;
  min-width: 132px;
  padding: 4px;
  animation: fadeIn 0.15s;
}
.theme-dropdown.show { display: block; }
.theme-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-primary);
  transition: background 0.2s;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.theme-option:hover { background: var(--bg-card-hover); }
.theme-option .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.theme-option.active .dot { border-color: var(--accent); background: var(--accent); }

/* ===== MINI PROGRESS (project cards) ===== */
.mini-progress {
  width: 100%;
  height: 4px;
  background: var(--progress-bar-bg);
  border-radius: 2px;
  margin-top: 8px;
  overflow: hidden;
}
.mini-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s ease;
}
.project-card.done .mini-progress-fill { background: var(--completed-text); }

/* ===== LAST UPDATED ===== */
.last-updated {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== VIEW TABS ===== */
.view-tabs {
  display: flex;
  gap: 4px;
  margin: 10px 0 14px;
  background: var(--bg-secondary);
  border-radius: 7px;
  padding: 3px;
  width: fit-content;
}
.view-tab {
  padding: 5px 14px;
  border: none;
  border-radius: 5px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.view-tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 1px 4px var(--shadow);
}
.view-tab:hover:not(.active) { color: var(--text-primary); }

/* ===== GANTT CHART ===== */
.gantt-container {
  overflow-x: auto;
  margin-top: 8px;
}
.gantt-chart {
  min-width: 650px;
}
.gantt-chart-wide {
  min-width: 700px;
}
.gantt-row {
  display: flex;
  align-items: center;
  height: 34px;
  border-bottom: 1px solid var(--gantt-line);
}
.gantt-label {
  width: 150px;
  min-width: 150px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  padding-right: 14px;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.gantt-track {
  flex: 1;
  display: flex;
  position: relative;
  height: 24px;
  margin-left: 8px;
}
.gantt-bar {
  position: absolute;
  height: 20px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  font-weight: 600;
  color: #fff;
  transition: all 0.3s;
  min-width: 20px;
  z-index: 2;
}
.gantt-bar.completed { background: var(--gantt-bar-done); }

/* Gantt marker for uncompleted tasks */
.gantt-marker {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  z-index: 2;
  line-height: 1;
}
.gantt-marker.locked { opacity: 0.5; }
.gantt-marker.pending { opacity: 0.7; }

/* Gantt grid lines */
.gantt-gridline {
  position: absolute;
  top: 0;
  height: 100%;
  width: 1px;
  background: var(--gantt-line);
  opacity: 0.5;
  z-index: 1;
  pointer-events: none;
}

.gantt-header {
  display: flex;
  align-items: center;
  height: 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}
.gantt-header-label {
  width: 150px;
  min-width: 150px;
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-align: right;
  padding-right: 14px;
  font-weight: 600;
}
.gantt-header-ticks {
  flex: 1;
  display: flex;
  position: relative;
  margin-left: 8px;
}
.gantt-tick {
  position: absolute;
  font-size: 0.68rem;
  color: var(--text-secondary);
  transform: translateX(-50%);
  white-space: nowrap;
}
.gantt-empty {
  text-align: center;
  padding: 30px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Gantt task list (shown when no completed tasks) */
.gantt-task-list {
  padding: 0 16px 12px;
}
.gantt-task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: 6px;
  margin-bottom: 4px;
  font-size: 0.82rem;
}
.gantt-task-item.locked { background: var(--locked-bg); color: var(--locked-text); }
.gantt-task-item.pending { background: var(--bg-card); color: var(--text-secondary); }
.gantt-task-name { font-weight: 600; }
.gantt-task-status { font-size: 0.8rem; }
.gantt-dep-hint { font-size: 0.72rem; opacity: 0.7; margin-left: 4px; }

/* ===== TEMPLATE LIST ===== */
.template-list {
  max-height: 200px;
  overflow-y: auto;
}
.template-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin-bottom: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.template-item:hover { background: var(--bg-card-hover); border-color: var(--accent); }
.template-item-info { flex: 1; }
.template-item-name { font-weight: 600; font-size: 0.88rem; }
.template-item-count { font-size: 0.72rem; color: var(--text-secondary); }
.template-item-del {
  background: none; border: none; color: var(--locked-text);
  cursor: pointer; font-size: 0.75rem; padding: 3px 8px;
  border-radius: 4px; transition: all 0.2s;
}
.template-item-del:hover { color: var(--danger); background: var(--stuck-bg); }
.btn-restore-templates {
  background: var(--bg-card); border: 1px dashed var(--border); color: var(--text-secondary);
  cursor: pointer; padding: 8px 14px; border-radius: 6px; font-size: 0.8rem;
  transition: all 0.2s;
}
.btn-restore-templates:hover { color: var(--accent); border-color: var(--accent); }
.no-templates { text-align: center; color: var(--text-secondary); padding: 20px; font-size: 0.9rem; }

/* ===== SIDEBAR FOOTER ===== */
.sidebar-footer {
  flex-shrink: 0;
  padding: 0 14px 10px;
  border-top: 1px solid var(--border);
}

.data-notice {
  margin: 10px 0 8px;
  padding: 8px 10px;
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--text-secondary);
  opacity: 0.85;
  overflow-wrap: anywhere;
  word-break: break-all;
}
.data-notice p {
  margin: 0;
}

.data-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.btn-data-action {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg-card);
  color: var(--text-secondary);
}
.btn-data-action:hover { background: var(--bg-card-hover); border-color: var(--accent); color: var(--text-primary); }

.sidebar-bottom-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.version-text {
  font-size: 0.72rem;
  color: var(--text-secondary);
}
.readme-link {
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.readme-link:hover { color: var(--accent); text-decoration: underline; }