:root {
  --bg: #0d0f14;
  --bg2: #13161e;
  --bg3: #1a1e28;
  --border: rgba(255, 255, 255, 0.07);
  --border2: rgba(255, 255, 255, 0.12);
  --text: #e8eaf0;
  --text2: #8b90a0;
  --text3: #555a6a;
  --p1: #7c6ff7;
  --p1l: rgba(124, 111, 247, 0.12);
  --p1b: rgba(124, 111, 247, 0.25);
  --p2: #1fc880;
  --p2l: rgba(31, 200, 128, 0.1);
  --p2b: rgba(31, 200, 128, 0.22);
  --p3: #f5a623;
  --p3l: rgba(245, 166, 35, 0.1);
  --p3b: rgba(245, 166, 35, 0.22);
  --red: #f06e6e;
  --redl: rgba(240, 110, 110, 0.1);
  --code-bg: #0a0c12;
  --radius: 10px;
  --radius-lg: 16px;
  --note-bg: rgba(245, 166, 35, 0.07);
  --note-border: rgba(245, 166, 35, 0.25);
  --highlight: rgba(124, 111, 247, 0.25);
}

/* ── LIGHT MODE ── */
html.light {
  --bg: #f5f6fa;
  --bg2: #ffffff;
  --bg3: #eef0f6;
  --border: rgba(0, 0, 0, 0.08);
  --border2: rgba(0, 0, 0, 0.14);
  --text: #1a1c24;
  --text2: #4a4f62;
  --text3: #9097b0;
  --p1: #5b52d6;
  --p1l: rgba(91, 82, 214, 0.09);
  --p1b: rgba(91, 82, 214, 0.22);
  --p2: #0fa863;
  --p2l: rgba(15, 168, 99, 0.09);
  --p2b: rgba(15, 168, 99, 0.2);
  --p3: #c27d0e;
  --p3l: rgba(194, 125, 14, 0.09);
  --p3b: rgba(194, 125, 14, 0.2);
  --code-bg: #f0f2f8;
  --note-bg: rgba(194, 125, 14, 0.07);
  --note-border: rgba(194, 125, 14, 0.25);
  --highlight: rgba(91, 82, 214, 0.18);
}

/* Smooth theme transition */
*,
*::before,
*::after {
  transition:
    background-color 0.22s ease,
    border-color 0.22s ease,
    color 0.15s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
}

/* SCROLLBAR */
::-webkit-scrollbar {
  width: 5px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-radius: 3px;
}

/* LAYOUT */
.layout {
  display: flex;
  min-height: 100vh;
  overflow: hidden;
}

/* SIDEBAR */
.sidebar {
  width: 260px;
  min-width: 260px;
  height: 100vh;
  overflow-y: auto;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 0 0 2rem;
}

.sidebar-logo {
  padding: 1.5rem 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}
.sidebar-logo .brand {
  font-size: 13px;
  font-weight: 600;
  color: var(--p1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.sidebar-logo .sub {
  font-size: 11px;
  color: var(--text3);
  margin-top: 3px;
}

.nav-section {
  padding: 0 0.75rem;
  margin-bottom: 0.5rem;
}
.nav-section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  padding: 0.5rem 0.5rem 0.3rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 7px;
  font-size: 13px;
  color: var(--text2);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  margin-bottom: 1px;
}
.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}
.nav-item.active {
  background: var(--p1l);
  color: var(--p1);
}
.nav-item.active .nav-dot {
  background: var(--p1);
}
.nav-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border2);
  flex-shrink: 0;
}
.nav-item.p2-active {
  background: var(--p2l);
  color: var(--p2);
}
.nav-item.p2-active .nav-dot {
  background: var(--p2);
}
.nav-item.p3-active {
  background: var(--p3l);
  color: var(--p3);
}
.nav-item.p3-active .nav-dot {
  background: var(--p3);
}

/* MAIN */
.main {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  max-height: 100vh;
}

/* HERO */
.hero {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 4rem 3rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 60% 80% at 80% 50%,
    rgba(124, 111, 247, 0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--p1l);
  border: 1px solid var(--p1b);
  color: var(--p1);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}
.hero h1 span {
  color: var(--p1);
}
.hero p {
  font-size: 15px;
  color: var(--text2);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 2rem;
}
.hero-stats {
  display: flex;
  gap: 2rem;
}
.stat {
}
.stat-num {
  font-size: 24px;
  font-weight: 700;
}
.stat-label {
  font-size: 12px;
  color: var(--text3);
  margin-top: 2px;
}

/* CONTENT */
.content {
  padding: 3rem 4rem;
  max-width: none;
  width: 100%;
  box-sizing: border-box;
}

/* PHASE HEADER */
.phase-block {
  margin-bottom: 4rem;
}
.phase-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 1rem;
}
.phase-tag.p1 {
  background: var(--p1l);
  color: var(--p1);
  border: 1px solid var(--p1b);
}
.phase-tag.p2 {
  background: var(--p2l);
  color: var(--p2);
  border: 1px solid var(--p2b);
}
.phase-tag.p3 {
  background: var(--p3l);
  color: var(--p3);
  border: 1px solid var(--p3b);
}

.phase-title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.phase-subtitle {
  font-size: 14px;
  color: var(--text2);
  margin-bottom: 2rem;
}

/* WEEK BLOCK */
.week-block {
  margin-bottom: 2rem;
  width: 100%;
}
.week-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.week-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* TOPIC CARD */
.topic-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: border-color 0.2s;
}
.topic-card:hover {
  border-color: var(--border2);
}

.topic-header {
  padding: 1.1rem 1.4rem;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
}
.topic-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
  margin-top: 2px;
}
.p1 .topic-icon {
  background: var(--p1l);
}
.p2 .topic-icon {
  background: var(--p2l);
}
.p3 .topic-icon {
  background: var(--p3l);
}

.topic-meta {
  flex: 1;
}
.topic-name {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 3px;
}
.topic-desc {
  font-size: 13px;
  color: var(--text2);
}
.topic-toggle {
  color: var(--text3);
  font-size: 12px;
  transition: transform 0.25s;
  margin-top: 6px;
}
.topic-toggle.open {
  transform: rotate(180deg);
}

.topic-body {
  display: none;
  border-top: 1px solid var(--border);
  width: 100%;
  box-sizing: border-box;
  transition: all 0.25s ease;
}
.topic-body.open {
  display: block;
}

/* THEORY */
.theory-section {
  padding: 1.4rem;
  border-bottom: 1px solid var(--border);
}
.theory-section:last-child {
  border-bottom: none;
}
.section-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text3);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-label::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--border2);
}

p {
  margin-bottom: 0.75rem;
  color: var(--text2);
  font-size: 14px;
}
p:last-child {
  margin-bottom: 0;
}

strong {
  color: var(--text);
  font-weight: 600;
}

/* CODE BLOCK */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0.75rem 0;
}
.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.code-lang {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text3);
  display: flex;
  align-items: center;
  gap: 8px;
}
.code-lang::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.code-lang.python::before {
  background: #3b82f6;
}
.code-lang.bash::before {
  background: var(--p2);
}
.code-lang.text::before {
  background: var(--text3);
}
.code-filename {
  font-size: 11px;
  color: var(--text3);
  font-family: "Cascadia Code", "Consolas", "Fira Code", monospace;
}
.code-copy {
  font-size: 11px;
  color: var(--text3);
  cursor: pointer;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: transparent;
  transition: all 0.15s;
}
.code-copy:hover {
  color: var(--text);
  border-color: var(--border2);
}

pre {
  padding: 1.1rem 1.4rem;
  overflow-x: auto;
  font-family: "Cascadia Code", "Consolas", "Fira Code", monospace;
  font-size: 13px;
  line-height: 1.7;
}
code {
  font-family: "Cascadia Code", "Consolas", "Fira Code", monospace;
}

/* SYNTAX HIGHLIGHT */
.kw {
  color: #c792ea;
}
.fn {
  color: #82aaff;
}
.str {
  color: #c3e88d;
}
.cmt {
  color: #546e7a;
  font-style: italic;
}
.num {
  color: #f78c6c;
}
.cls {
  color: #ffcb6b;
}
.dec {
  color: #89ddff;
}
.self {
  color: #f07178;
}
.imp {
  color: var(--p1);
}

/* INLINE CODE */
code:not(pre code) {
  background: rgba(124, 111, 247, 0.12);
  color: #c4baff;
  font-size: 12.5px;
  padding: 2px 7px;
  border-radius: 5px;
}

/* EXERCISES */
.exercises {
}
.ex-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.ex-item:last-child {
  border-bottom: none;
}
.ex-num {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.p1 .ex-num {
  background: var(--p1l);
  color: var(--p1);
}
.p2 .ex-num {
  background: var(--p2l);
  color: var(--p2);
}
.p3 .ex-num {
  background: var(--p3l);
  color: var(--p3);
}
.ex-text {
}
.ex-title {
  font-weight: 600;
  margin-bottom: 3px;
  color: var(--text);
}
.ex-desc {
  color: var(--text2);
  font-size: 12px;
  line-height: 1.5;
}

/* TIPS */
.tip-box {
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  margin: 0.75rem 0;
  display: flex;
  gap: 10px;
  font-size: 13px;
}
.tip-box.info {
  background: rgba(124, 111, 247, 0.08);
  border-left: 3px solid var(--p1);
}
.tip-box.success {
  background: rgba(31, 200, 128, 0.07);
  border-left: 3px solid var(--p2);
}
.tip-box.warning {
  background: rgba(245, 166, 35, 0.08);
  border-left: 3px solid var(--p3);
}
.tip-box.danger {
  background: rgba(240, 110, 110, 0.08);
  border-left: 3px solid var(--red);
}
.tip-icon {
  flex-shrink: 0;
  font-size: 14px;
  margin-top: 1px;
}
.tip-content {
  color: var(--text2);
  line-height: 1.6;
}
.tip-content strong {
  color: var(--text);
}

/* TABLE */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 0.75rem 0;
}
.data-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg3);
  color: var(--text2);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-bottom: 1px solid var(--border2);
}
.data-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text2);
  vertical-align: top;
}
.data-table tr:last-child td {
  border-bottom: none;
}
.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* MILESTONE */
.milestone-card {
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  margin-top: 2rem;
  position: relative;
  overflow: hidden;
}
.milestone-card.p1 {
  background: linear-gradient(
    135deg,
    rgba(124, 111, 247, 0.1),
    rgba(124, 111, 247, 0.04)
  );
  border: 1px solid var(--p1b);
}
.milestone-card.p2 {
  background: linear-gradient(
    135deg,
    rgba(31, 200, 128, 0.1),
    rgba(31, 200, 128, 0.03)
  );
  border: 1px solid var(--p2b);
}
.milestone-card.p3 {
  background: linear-gradient(
    135deg,
    rgba(245, 166, 35, 0.1),
    rgba(245, 166, 35, 0.03)
  );
  border: 1px solid var(--p3b);
}
.milestone-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.5rem;
}
.p1 .milestone-label {
  color: var(--p1);
}
.p2 .milestone-label {
  color: var(--p2);
}
.p3 .milestone-label {
  color: var(--p3);
}
.milestone-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.milestone-desc {
  font-size: 13px;
  color: var(--text2);
  line-height: 1.7;
  margin-bottom: 1rem;
}
.checklist {
  list-style: none;
}
.checklist li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 13px;
  color: var(--text2);
  padding: 4px 0;
}
.checklist li::before {
  content: "✓";
  font-weight: 700;
  margin-top: 1px;
  flex-shrink: 0;
}
.p1 .checklist li::before {
  color: var(--p1);
}
.p2 .checklist li::before {
  color: var(--p2);
}
.p3 .checklist li::before {
  color: var(--p3);
}

/* DIVIDER */
.divider {
  height: 1px;
  background: var(--border);
  margin: 2.5rem 0;
}

/* FOLDER TREE */
.tree {
  font-family: "Cascadia Code", "Consolas", "Fira Code", monospace;
  font-size: 13px;
  line-height: 1.9;
}
.tree-file {
  color: var(--text2);
}
.tree-dir {
  color: var(--p3);
  font-weight: 500;
}
.tree-py {
  color: #82aaff;
}
.tree-comment {
  color: var(--text3);
}

/* TOC progress */
.toc-progress {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  margin-top: 1rem;
}
.progress-bar {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 6px;
}
.progress-fill {
  height: 100%;
  background: var(--p1);
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s;
}
.progress-label {
  font-size: 11px;
  color: var(--text3);
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    display: none;
  }
  .hero {
    padding: 2rem 1.5rem;
  }
  .hero h1 {
    font-size: 26px;
  }
  .content {
    padding: 2rem 1.5rem;
  }
}

/* ANIMATIONS */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.phase-block {
  animation: fadeIn 0.4s ease both;
  width: inherit;
}
.phase-block:nth-child(2) {
  animation-delay: 0.1s;
}
.phase-block:nth-child(3) {
  animation-delay: 0.2s;
}

/* TIP BOXES */
.tip-box {
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  margin: 0.75rem 0;
  display: flex;
  gap: 10px;
  font-size: 13px;
}
.tip-box.info {
  background: rgba(124, 111, 247, 0.08);
  border-left: 3px solid var(--p1);
}
.tip-box.success {
  background: rgba(31, 200, 128, 0.07);
  border-left: 3px solid var(--p2);
}
.tip-box.warning {
  background: rgba(245, 166, 35, 0.08);
  border-left: 3px solid var(--p3);
}
.tip-box.danger {
  background: rgba(240, 110, 110, 0.08);
  border-left: 3px solid var(--red);
}
.tip-icon {
  flex-shrink: 0;
  font-size: 14px;
  margin-top: 1px;
}
.tip-content {
  color: var(--text2);
  line-height: 1.6;
}
.tip-content strong {
  color: var(--text);
}

/* ── CHECKBOX ── */
.ex-item {
  position: relative;
}
.ex-check {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 1.5px solid var(--border2);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 3px;
  transition: all 0.18s;
  position: relative;
}
.ex-check:hover {
  border-color: var(--text3);
}
.ex-check:checked {
  border-color: transparent;
  background: var(--p2);
}
.ex-check:checked::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 5px;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}
.ex-item.done .ex-title {
  text-decoration: line-through;
  color: var(--text3);
}
.ex-item.done .ex-desc {
  opacity: 0.5;
}

/* milestone checklist checkbox */
.checklist li {
  cursor: pointer;
  border-radius: 6px;
  padding: 5px 6px;
  transition: background 0.15s;
  margin: 0 -6px;
}
.checklist li:hover {
  background: rgba(255, 255, 255, 0.04);
}
.milestone-check {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1.5px solid var(--border2);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 2px;
  transition: all 0.18s;
  position: relative;
}
.milestone-check:checked {
  border-color: transparent;
}
.milestone-check:checked::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 4px;
  width: 4px;
  height: 8px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}
.p1 .milestone-check:checked {
  background: var(--p1);
}
.p2 .milestone-check:checked {
  background: var(--p2);
}
.p3 .milestone-check:checked {
  background: var(--p3);
}
.checklist li.done span {
  text-decoration: line-through;
  opacity: 0.55;
}

/* ── PHASE PROGRESS BAR ── */
.phase-progress-wrap {
  margin-bottom: 1.75rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
}
.phase-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}
.phase-progress-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
}
.phase-progress-pct {
  font-size: 13px;
  font-weight: 700;
}
.phase-bar-track {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.phase-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}
.p1 .phase-bar-fill {
  background: var(--p1);
}
.p2 .phase-bar-fill {
  background: var(--p2);
}
.p3 .phase-bar-fill {
  background: var(--p3);
}
.phase-progress-tasks {
  font-size: 11px;
  color: var(--text3);
  margin-top: 0.4rem;
}

/* ── OVERALL PROGRESS IN HERO ── */
.overall-progress {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.overall-progress-label {
  font-size: 12px;
  color: var(--text2);
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
}
.overall-progress-label span {
  font-weight: 700;
  color: var(--text);
}
.overall-bar-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 4px;
  overflow: hidden;
}
.overall-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--p1), var(--p2));
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}
.overall-phases {
  display: flex;
  gap: 1.5rem;
  margin-top: 0.75rem;
}
.overall-phase-stat {
  font-size: 12px;
  color: var(--text3);
}
.overall-phase-stat b {
  font-weight: 700;
}
.overall-phase-stat.p1s b {
  color: var(--p1);
}
.overall-phase-stat.p2s b {
  color: var(--p2);
}
.overall-phase-stat.p3s b {
  color: var(--p3);
}

/* ── SIDEBAR PROGRESS DOTS per week ── */
.nav-item .nav-progress {
  margin-left: auto;
  font-size: 10px;
  font-weight: 700;
  color: var(--text3);
}
.nav-item.all-done .nav-progress {
  color: var(--p2);
}

@keyframes checkPop {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.35);
  }
  100% {
    transform: scale(1);
  }
}
.ex-check:checked {
  animation: checkPop 0.25s ease;
}
.milestone-check:checked {
  animation: checkPop 0.25s ease;
}

/* ══════════════════════════════
   TOOLBAR (search + theme toggle)
══════════════════════════════ */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.search-wrap {
  flex: 1;
  position: relative;
}
.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--text3);
  pointer-events: none;
}
#searchInput {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px 6px 30px;
  font-size: 12px;
  color: var(--text);
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  outline: none;
  transition: border-color 0.15s;
}
#searchInput::placeholder {
  color: var(--text3);
}
#searchInput:focus {
  border-color: var(--p1);
}
.clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text3);
  cursor: pointer;
  font-size: 14px;
  padding: 0 2px;
  display: none;
}
.clear-btn.show {
  display: block;
}

.theme-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border2);
  background: var(--bg3);
  color: var(--text2);
  cursor: pointer;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s;
}
.theme-btn:hover {
  background: var(--border);
  color: var(--text);
}

/* ── SEARCH RESULTS / HIGHLIGHT ── */
.search-highlight {
  background: var(--highlight);
  border-radius: 3px;
  padding: 1px 2px;
  color: var(--text);
}
.search-no-results {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text3);
  font-size: 14px;
  display: none;
}

/* topic-card hidden by search */
.topic-card.search-hidden {
  display: none;
}
.week-block.search-hidden {
  display: none;
}

/* search result: auto-expand topic bodies */
.topic-card.search-match .topic-body {
  display: block;
}
.topic-card.search-match .topic-toggle {
  transform: rotate(180deg);
}

/* ══════════════════════════════
   NOTES SYSTEM
══════════════════════════════ */
.note-toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text3);
  font-size: 12px;
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  padding: 5px 10px;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: all 0.15s;
}
.note-toggle-btn:hover {
  border-color: var(--p3b);
  color: var(--p3);
}
.note-toggle-btn.has-note {
  border-color: var(--p3b);
  color: var(--p3);
  background: var(--note-bg);
}

.note-area {
  margin: 0 1.4rem 1.2rem;
  display: none;
}
.note-area.open {
  display: block;
}
.note-textarea {
  width: 100%;
  min-height: 80px;
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: 8px;
  color: var(--text);
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  font-size: 13px;
  line-height: 1.6;
  padding: 0.75rem 1rem;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s;
}
.note-textarea:focus {
  border-color: var(--p3);
}
.note-textarea::placeholder {
  color: var(--text3);
}
.note-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.4rem;
}
.note-save-btn {
  background: var(--p3l);
  border: 1px solid var(--p3b);
  color: var(--p3);
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 12px;
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  cursor: pointer;
  transition: all 0.15s;
}
.note-save-btn:hover {
  background: var(--p3b);
}
.note-clear-btn {
  background: none;
  border: none;
  color: var(--text3);
  font-size: 12px;
  cursor: pointer;
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
}
.note-clear-btn:hover {
  color: var(--red);
}
.note-saved-msg {
  font-size: 11px;
  color: var(--p2);
  opacity: 0;
  transition: opacity 0.3s;
}
.note-saved-msg.show {
  opacity: 1;
}

/* note dot on topic header */
.note-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--p3);
  flex-shrink: 0;
  margin-top: 8px;
  display: none;
}
.note-dot.show {
  display: block;
}

/* ══════════════════════════════════════
   PHASE PLACEHOLDERS & LOADING
══════════════════════════════════════ */
.phase-placeholder {
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg2);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  margin: 20px 0;
  opacity: 0.7;
  width: 100%;
}

.phase-placeholder.loaded {
  background: transparent;
  border: none;
  opacity: 1;
  min-height: auto;
}

.phase-error {
  color: var(--red);
  text-align: center;
  padding: 20px;
  font-size: 14px;
}