/* ── Reset & base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.milestone-floating[hidden],
.milestone-show-btn[hidden] {
  display: none !important;
}

:root {
  --bg: #f8fafc;
  --text: #1e293b;
  --header-bg: #1e293b;
  --header-text: #f8fafc;
  --subtitle: #94a3b8;
  --semester-label: #64748b;
  --toast-bg: #1e293b;
  --toast-text: #f8fafc;
  --milestone-bg: #e2e8f0;
  --milestone-border: #cbd5e1;
  --milestone-text: #334155;
  --milestone-ok-bg: #dcfce7;
  --milestone-ok-border: #22c55e;
  --milestone-ok-text: #14532d;

  --color-pending-bg: #e2e8f0;
  --color-pending-border: #94a3b8;
  --color-pending-text: #334155;

  --color-regular-bg: #fef9c3;
  --color-regular-border: #eab308;
  --color-regular-text: #713f12;

  --color-approved-bg: #dcfce7;
  --color-approved-border: #22c55e;
  --color-approved-text: #14532d;

  --color-locked-bg: #f1f5f9;
  --color-locked-border: #cbd5e1;
  --color-locked-text: #94a3b8;

  --btn-theme-bg: #334155;
  --btn-theme-bg-hover: #475569;
  --btn-theme-text: #f8fafc;
  --btn-danger-bg: #ef4444;
  --btn-danger-bg-hover: #dc2626;
  --fab-bg: #2563eb;
  --fab-bg-hover: #1d4ed8;
  --fab-text: #f8fafc;

  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

body[data-theme="dark"] {
  --bg: #0f172a;
  --text: #e2e8f0;
  --header-bg: #020617;
  --header-text: #f8fafc;
  --subtitle: #94a3b8;
  --semester-label: #94a3b8;
  --toast-bg: #020617;
  --toast-text: #e2e8f0;
  --milestone-bg: #1e293b;
  --milestone-border: #334155;
  --milestone-text: #cbd5e1;
  --milestone-ok-bg: #0f2f1f;
  --milestone-ok-border: #22c55e;
  --milestone-ok-text: #bbf7d0;

  --color-pending-bg: #1e293b;
  --color-pending-border: #475569;
  --color-pending-text: #cbd5e1;

  --color-regular-bg: #3f3208;
  --color-regular-border: #eab308;
  --color-regular-text: #fde68a;

  --color-approved-bg: #0f2f1f;
  --color-approved-border: #22c55e;
  --color-approved-text: #bbf7d0;

  --color-locked-bg: #111827;
  --color-locked-border: #374151;
  --color-locked-text: #6b7280;

  --btn-theme-bg: #f8fafc;
  --btn-theme-bg-hover: #e2e8f0;
  --btn-theme-text: #0f172a;
  --btn-danger-bg: #b91c1c;
  --btn-danger-bg-hover: #991b1b;
  --fab-bg: #3b82f6;
  --fab-bg-hover: #2563eb;
  --fab-text: #eff6ff;

  --shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.25s ease, color 0.25s ease;
}

/* ── Header ───────────────────────────────────────────────── */
body > header {
  background: linear-gradient(135deg, var(--header-bg) 0%, #16253f 100%);
  color: var(--header-text);
  border-bottom: 1px solid rgba(148, 163, 184, .2);
  padding: 1rem 2rem 1.1rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: .9rem 1.25rem;
}

.header-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: .38rem;
}

.title-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .24rem;
  min-width: 0;
}

body > header h1 {
  font-size: clamp(1.45rem, 1.15rem + .6vw, 1.95rem);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: .01em;
  white-space: nowrap;
}

.subtitle {
  font-size: .95rem;
  color: var(--subtitle);
  line-height: 1.35;
  max-width: 72ch;
}

.career-name {
  font-size: .98rem;
  font-weight: 600;
  color: var(--header-text);
  opacity: .95;
  min-height: 1.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-controls {
  min-width: min(460px, 100%);
  display: grid;
  justify-items: end;
  gap: .55rem;
}

.career-picker {
  display: flex;
  align-items: center;
  gap: .55rem;
  width: 100%;
  justify-content: flex-end;
}

.career-picker label {
  font-size: .84rem;
  color: var(--subtitle);
  font-weight: 600;
}

.career-picker select {
  border: 1px solid #64748b;
  background: rgba(255, 255, 255, 0.92);
  color: #0f172a;
  border-radius: var(--radius);
  padding: .42rem .6rem;
  font-size: .92rem;
  width: clamp(290px, 30vw, 430px);
  max-width: 100%;
}

body[data-theme="dark"] .career-picker select {
  border-color: #475569;
  background: #0f172a;
  color: #e2e8f0;
}

.tools-menu {
  position: fixed;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: .35rem;
  border-radius: var(--radius);
  border: 1px solid var(--milestone-border);
  background: var(--milestone-bg);
  box-shadow: var(--shadow);
  z-index: 9800;
}

.tools-menu button {
  border: 1px solid var(--milestone-border);
  background: transparent;
  color: var(--text);
  border-radius: var(--radius);
  font-size: .78rem;
  font-weight: 700;
  text-align: left;
  padding: .42rem .52rem;
  cursor: pointer;
}

.tools-menu #btn-theme {
  border: none;
  background: var(--btn-theme-bg);
  color: var(--btn-theme-text);
  text-align: center;
}

.tools-menu #btn-theme:hover {
  background: var(--btn-theme-bg-hover);
  filter: none;
}

.tools-menu button:hover { filter: brightness(.96); }

.tools-menu[hidden] {
  display: none !important;
}

/* ── Career hero/progress ─────────────────────────────────── */
.career-hero {
  max-width: 960px;
  margin: .8rem auto 0;
  padding: 0 1rem;
  min-height: 4.4rem;
}

.career-hero-box {
  border: 1px solid var(--milestone-border);
  border-radius: var(--radius);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  padding: .75rem .85rem;
  box-shadow: var(--shadow);
}

.career-hero-title {
  font-size: clamp(1.18rem, 1.02rem + .6vw, 1.7rem);
  font-weight: 800;
  line-height: 1.2;
}

.career-hero-meta {
  margin-top: .25rem;
  font-size: .82rem;
  font-weight: 600;
  opacity: .9;
}

.view-mode-toggle {
  max-width: 960px;
  margin: .5rem auto 0;
  padding: 0 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: .32rem;
}

.view-mode-toggle button {
  border: 1px solid var(--milestone-border);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  border-radius: 999px;
  padding: .28rem .62rem;
  font-size: .74rem;
  font-weight: 700;
  cursor: pointer;
}

.view-mode-toggle button.active {
  border-color: #3b82f6;
  box-shadow: inset 0 0 0 1px rgba(59, 130, 246, .35);
  background: rgba(59, 130, 246, .12);
}

.career-progress-floating {
  position: sticky;
  top: .6rem;
  z-index: 40;
  width: min(540px, calc(100vw - 2rem));
  margin: .65rem auto 0;
  min-height: 5.1rem;
}

.career-progress-box {
  border: 1px solid var(--milestone-border);
  border-radius: var(--radius);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  padding: .65rem .75rem;
  box-shadow: var(--shadow);
}

.career-progress-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .6rem;
  margin-bottom: .36rem;
}

.career-progress-career {
  font-size: .86rem;
  font-weight: 800;
  line-height: 1.24;
}

.career-progress-toolbar {
  display: inline-flex;
  gap: .35rem;
}

.progress-icon-btn {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--milestone-border);
  border-radius: 999px;
  background: var(--milestone-bg);
  color: var(--milestone-text);
  font-size: 1rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
}

.progress-icon-btn:hover {
  filter: brightness(.96);
}

.progress-icon-btn.danger {
  border-color: #ef4444;
  color: #ef4444;
}

.career-progress-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .2rem;
  margin-bottom: .45rem;
}

.career-progress-title {
  font-size: .8rem;
  font-weight: 700;
}

.career-progress-meta {
  font-size: .78rem;
  font-weight: 700;
  opacity: .9;
  overflow-wrap: anywhere;
}

.career-progress-states {
  display: flex;
  flex-wrap: wrap;
  gap: .36rem;
  margin-bottom: .45rem;
}

.state-pill {
  font-size: .72rem;
  font-weight: 700;
  padding: .2rem .52rem;
  border-radius: 999px;
  border: 2px solid transparent;
  white-space: nowrap;
}

.state-pill.pending  { background: var(--color-pending-bg);  border-color: var(--color-pending-border);  color: var(--color-pending-text); }
.state-pill.regular  { background: var(--color-regular-bg);  border-color: var(--color-regular-border);  color: var(--color-regular-text); }
.state-pill.approved { background: var(--color-approved-bg); border-color: var(--color-approved-border); color: var(--color-approved-text); }

.career-progress-track {
  width: 100%;
  height: .58rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, .35);
  overflow: hidden;
}

.career-progress-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, #eab308, #22c55e);
  transition: width .25s ease;
}

/* ── Floating milestones & career switch ─────────────────── */
.milestone-floating {
  position: fixed;
  right: 1rem;
  bottom: 5.5rem;
  z-index: 9900;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  max-width: 360px;
  pointer-events: auto;
}

.milestone-floating-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  border-radius: var(--radius);
  padding: .5rem .7rem;
  border: 1px solid var(--milestone-border);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  box-shadow: var(--shadow);
}

.milestone-floating-title {
  font-size: .8rem;
  font-weight: 700;
}

#btn-hide-milestones,
.milestone-show-btn {
  border: 1px solid var(--milestone-border);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  border-radius: 999px;
  padding: .32rem .62rem;
  font-size: .72rem;
  font-weight: 700;
  cursor: pointer;
}

#btn-hide-milestones:hover,
.milestone-show-btn:hover {
  filter: brightness(.97);
}

.milestone-float-card {
  border-radius: var(--radius);
  padding: .55rem .75rem;
  border: 1px solid var(--milestone-border);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  font-size: .78rem;
  font-weight: 600;
  line-height: 1.3;
  box-shadow: var(--shadow);
}

.milestone-float-title {
  display: block;
  margin-bottom: .2rem;
}

.milestone-float-progress {
  display: block;
  font-size: .72rem;
  opacity: .88;
}

.milestone-float-card.achieved {
  border-color: var(--milestone-ok-border);
  background: var(--milestone-ok-bg);
  color: var(--milestone-ok-text);
}

.milestone-float-card.new-achievement {
  animation: milestone-pop .5s ease;
}

@keyframes milestone-pop {
  0% { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

.milestone-show-btn {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 9900;
}

.career-fab {
  display: none;
  position: fixed;
  left: 1rem;
  bottom: 1rem;
  z-index: 9900;
  border: none;
  background: var(--fab-bg);
  color: var(--fab-text);
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  padding: .52rem .9rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: background .2s ease;
}

.career-fab:hover {
  background: var(--fab-bg-hover);
}

.career-fab-panel {
  display: none;
  position: fixed;
  left: 1rem;
  bottom: 3.65rem;
  z-index: 9900;
  width: min(380px, calc(100vw - 2rem));
  border: 1px solid var(--milestone-border);
  border-radius: var(--radius);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  box-shadow: var(--shadow);
  padding: .6rem .7rem;
}

.career-fab-title {
  font-size: .75rem;
  font-weight: 800;
  margin-bottom: .45rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.career-fab-panel select {
  width: 100%;
  border: 1px solid #64748b;
  background: rgba(255, 255, 255, .95);
  color: #0f172a;
  border-radius: var(--radius);
  padding: .45rem .55rem;
  font-size: .88rem;
}

body[data-theme="dark"] .career-fab-panel select {
  border-color: #475569;
  background: #0f172a;
  color: #e2e8f0;
}

.career-fab[hidden],
.career-fab-panel[hidden] {
  display: none !important;
}

/* ── Floating achievements ─────────────────────────────────── */
.achievement-stack {
  position: fixed;
  right: 1rem;
  top: 10.2rem;
  z-index: 9950;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  width: min(380px, calc(100vw - 2rem));
  pointer-events: none;
}

.achievement-toast {
  pointer-events: auto;
  border-radius: var(--radius);
  border: 1px solid var(--milestone-ok-border);
  background: var(--milestone-ok-bg);
  color: var(--milestone-ok-text);
  box-shadow: var(--shadow);
  padding: .62rem .75rem;
  animation: achievement-in .3s ease;
}

.achievement-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  margin-bottom: .18rem;
}

.achievement-title {
  font-size: .82rem;
  font-weight: 800;
}

.achievement-close {
  border: 1px solid var(--milestone-ok-border);
  background: transparent;
  color: inherit;
  border-radius: 999px;
  width: 1.55rem;
  height: 1.55rem;
  font-size: .85rem;
  line-height: 1;
  cursor: pointer;
}

.achievement-body {
  font-size: .76rem;
  font-weight: 600;
  line-height: 1.35;
}

@keyframes achievement-in {
  from { transform: translateY(-8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ── Diagram container ────────────────────────────────────── */
main { padding: 1.15rem 1rem 2.8rem; }

#diagram-container {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
}

#arrows-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
  z-index: 0;
}

/* ── Semesters ────────────────────────────────────────────── */
#semesters {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  position: relative;
  z-index: 1;
  padding: .4rem .2rem;
}

#semesters:empty {
  min-height: 55vh;
}

#semesters[hidden] {
  display: none !important;
}

#semesters-accordion {
  display: flex;
  flex-direction: column;
  gap: .7rem;
}

#semesters-accordion[hidden] {
  display: none !important;
}

#programs-view,
#links-view {
  display: flex;
  flex-direction: column;
  gap: .85rem;
  padding: .4rem .2rem;
}

#programs-view[hidden],
#links-view[hidden] {
  display: none !important;
}

.semester-block {
  display: flex;
  flex-direction: column;
  gap: .9rem;
  padding: .85rem .9rem;
  border: 1px solid rgba(148, 163, 184, .26);
  border-radius: calc(var(--radius) + 2px);
  background: rgba(148, 163, 184, .05);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}

body[data-theme="dark"] .semester-block {
  background: rgba(30, 41, 59, .44);
  border-color: rgba(71, 85, 105, .62);
}

.semester-label {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--semester-label);
  border: 1px solid rgba(100, 116, 139, .42);
  border-radius: 999px;
  align-self: center;
  padding: .3rem .7rem;
  background: rgba(226, 232, 240, .55);
  cursor: pointer;
  user-select: none;
  transition: transform .15s ease, filter .15s ease;
  position: relative;
  z-index: 3;
}

.semester-label:hover {
  filter: brightness(.96);
  transform: translateY(-1px);
}

.semester-label:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

body[data-theme="dark"] .semester-label {
  border-color: rgba(148, 163, 184, .48);
  background: rgba(2, 6, 23, .72);
}

.subject-card.bulk-blocked {
  animation: blocked-flash .7s ease;
}

@keyframes blocked-flash {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, .55); }
  100% { box-shadow: var(--shadow); }
}

.subjects-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  align-items: stretch;
  gap: 1rem;
}

.semester-accordion {
  border: 1px solid rgba(148, 163, 184, .36);
  border-radius: calc(var(--radius) + 2px);
  background: rgba(148, 163, 184, .05);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.semester-accordion-summary {
  list-style: none;
  padding: .65rem .75rem;
  cursor: pointer;
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--semester-label);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.semester-accordion-summary::-webkit-details-marker {
  display: none;
}

.semester-accordion-summary::after {
  content: "▾";
  font-size: .8rem;
  opacity: .85;
  transform: rotate(-90deg);
  transition: transform .2s ease;
}

.semester-accordion[open] .semester-accordion-summary::after {
  transform: rotate(0deg);
}

.semester-accordion-actions {
  padding: 0 .75rem .5rem;
}

.semester-accordion-cycle {
  border: 1px solid var(--milestone-border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: .22rem .56rem;
  font-size: .7rem;
  font-weight: 700;
  cursor: pointer;
}

.semester-accordion-cycle:hover {
  filter: brightness(.96);
}

.subjects-accordion-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .7rem;
  padding: 0 .7rem .75rem;
}

.aux-view {
  display: flex;
  flex-direction: column;
  gap: .85rem;
}

.aux-block {
  border: 1px solid rgba(148, 163, 184, .26);
  border-radius: calc(var(--radius) + 2px);
  background: rgba(148, 163, 184, .05);
  box-shadow: var(--shadow);
  padding: .75rem .85rem;
}

.aux-block-title {
  font-size: .84rem;
  font-weight: 800;
  color: var(--semester-label);
  margin-bottom: .5rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.aux-empty {
  border: 1px dashed var(--milestone-border);
  border-radius: var(--radius);
  padding: .8rem;
  color: var(--semester-label);
  font-size: .82rem;
  font-weight: 600;
  text-align: center;
}

.aux-note {
  font-size: .78rem;
  font-weight: 600;
  color: var(--semester-label);
  text-align: center;
}

.programs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.program-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: .55rem;
  border: 1px solid var(--milestone-border);
  border-radius: var(--radius);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  padding: .45rem .55rem;
}

.program-item-name {
  font-size: .79rem;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.program-item-link {
  border: 1px solid var(--milestone-border);
  border-radius: 999px;
  padding: .2rem .55rem;
  font-size: .72rem;
  font-weight: 700;
  color: inherit;
  text-decoration: none;
}

.program-item-link:hover {
  filter: brightness(.96);
}

.program-item-missing {
  font-size: .71rem;
  font-weight: 700;
  color: var(--semester-label);
}

.links-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: .7rem;
}

.link-card {
  border: 1px solid var(--milestone-border);
  border-radius: var(--radius);
  background: var(--milestone-bg);
  color: var(--milestone-text);
  box-shadow: var(--shadow);
  padding: .7rem .75rem;
}

.link-card-title {
  font-size: .85rem;
  font-weight: 800;
  color: inherit;
  text-decoration: none;
}

.link-card-title:hover {
  text-decoration: underline;
}

.link-card-description {
  margin-top: .35rem;
  font-size: .78rem;
  line-height: 1.35;
  color: var(--semester-label);
}

/* ── Subject card ─────────────────────────────────────────── */
.subject-card {
  width: 100%;
  padding: .85rem 1rem;
  border-radius: var(--radius);
  border: 2px solid var(--color-pending-border);
  background: var(--color-pending-bg);
  color: var(--color-pending-text);
  cursor: pointer;
  user-select: none;
  transition: transform .15s, box-shadow .15s, background .2s, border-color .2s, color .2s, opacity .2s;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 3;
}

.subject-card:hover:not(.locked) {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .18);
}

.subject-card.locked {
  background: var(--color-locked-bg);
  border-color: var(--color-locked-border);
  color: var(--color-locked-text);
  cursor: not-allowed;
  opacity: .75;
}

.subject-card.state-1 {
  background: var(--color-regular-bg);
  border-color: var(--color-regular-border);
  color: var(--color-regular-text);
}

.subject-card.state-2 {
  background: var(--color-approved-bg);
  border-color: var(--color-approved-border);
  color: var(--color-approved-text);
}

.subject-card.path-prereq {
  box-shadow: 0 0 0 2px rgba(56, 189, 248, .38), var(--shadow);
}

.subject-card.path-target {
  box-shadow: 0 0 0 3px rgba(56, 189, 248, .62), var(--shadow);
}

.subject-card.required-for-unlock {
  box-shadow: 0 0 0 3px rgba(245, 158, 11, .6), var(--shadow);
}

.subject-card.unlock-target {
  border-color: #f97316 !important;
  box-shadow: 0 0 0 2px rgba(249, 115, 22, .45), var(--shadow);
}

.subject-name {
  font-size: .88rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: .35rem;
}

.subject-status {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  opacity: .75;
}

.lock-icon {
  position: absolute;
  top: .45rem;
  right: .55rem;
  font-size: .85rem;
  opacity: .6;
}

/* ── SVG Arrows ───────────────────────────────────────────── */
.arrow-line {
  fill: none;
  stroke: var(--edge-color, #94a3b8);
  stroke-width: 1.65;
  stroke-opacity: .14;
  stroke-dasharray: 6 5;
  transition: stroke-width .3s, stroke-opacity .3s;
}

.arrow-line.state-regular {
  stroke-width: 1.9;
  stroke-opacity: .36;
  stroke-dasharray: 4 4;
}

.arrow-line.state-approved {
  stroke-width: 2.35;
  stroke-opacity: .82;
  stroke-dasharray: none;
}

.arrow-line.path-muted {
  stroke-opacity: .06 !important;
}

.arrow-line.path-active {
  stroke-width: 2.7 !important;
  stroke-opacity: .98 !important;
  stroke-dasharray: none !important;
}

.arrow-line.requirement-active {
  stroke-width: 2.8 !important;
  stroke-opacity: .95 !important;
  stroke-dasharray: none !important;
}

/* ── PNG Export ───────────────────────────────────────────── */
.png-export-sandbox {
  position: fixed;
  top: 0;
  left: -100000px;
  pointer-events: none;
  opacity: 0;
  background: #ffffff;
  padding: 12px;
}

.png-export-sandbox .png-export-target {
  position: relative;
  background: #ffffff;
}

.png-export-sandbox #arrows-svg {
  z-index: 1;
}

.png-export-sandbox #semesters {
  z-index: 2;
}

.png-export-sandbox .semester-block {
  background: #ffffff;
  border-color: #d1d5db;
  box-shadow: none;
}

.png-export-sandbox .subject-card {
  box-shadow: none;
  opacity: 1;
}

.png-export-sandbox .arrow-line {
  stroke-opacity: .52;
  stroke-width: 1.9;
  stroke-dasharray: none;
}

/* ── Toast ────────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--toast-bg);
  color: var(--toast-text);
  padding: .7rem 1.4rem;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 500;
  box-shadow: 0 4px 20px rgba(0, 0, 0, .25);
  transition: transform .3s ease, opacity .3s ease;
  opacity: 0;
  pointer-events: none;
  z-index: 9999;
  max-width: 90vw;
  text-align: center;
}

#toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ── Onboarding / footer ─────────────────────────────────── */
.onboarding-guide {
  position: fixed;
  top: 50%;
  left: 50%;
  right: auto;
  bottom: auto;
  transform: translate(-50%, -50%);
  width: min(460px, calc(100vw - 1.5rem));
  max-height: min(82vh, 560px);
  overflow: auto;
  background: var(--milestone-bg);
  color: var(--milestone-text);
  border: 1px solid var(--milestone-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: .7rem .8rem;
  z-index: 9800;
  animation: onboarding-in .35s ease;
}

@keyframes onboarding-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.onboarding-step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .45rem;
  margin-bottom: .28rem;
}

.onboarding-step-counter {
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  opacity: .75;
}

#btn-onboarding-close {
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid var(--milestone-border);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-size: .74rem;
  font-weight: 700;
  cursor: pointer;
}

.onboarding-title {
  font-size: .88rem;
  font-weight: 800;
  margin-bottom: .32rem;
}

.onboarding-body {
  font-size: .78rem;
  line-height: 1.4;
  margin-bottom: .3rem;
}

.onboarding-actions {
  display: flex;
  gap: .45rem;
  margin-top: .35rem;
}

.onboarding-actions button {
  border: 1px solid var(--milestone-border);
  background: transparent;
  color: var(--text);
  border-radius: var(--radius);
  padding: .35rem .55rem;
  font-size: .74rem;
  font-weight: 700;
  cursor: pointer;
}

.onboarding-actions button:hover { filter: brightness(.96); }

#btn-onboarding-never {
  background-color: #8b5cf6; /* Violeta vibrante para resaltar */
  color: #ffffff;
  border-color: #8b5cf6;
}

#btn-onboarding-never:hover {
  background-color: #7c3aed;
  border-color: #7c3aed;
  filter: none;
}

body[data-theme="dark"] #btn-onboarding-never {
  background-color: #6d28d9; /* Violeta un poco más oscuro para modo noche */
  border-color: #6d28d9;
}

.onboarding-focus {
  position: fixed;
  border-radius: 10px;
  border: 2px solid #3b82f6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, .25);
  pointer-events: none;
  z-index: 9797;
  transition: top .2s ease, left .2s ease, width .2s ease, height .2s ease;
}

.onboarding-target {
  position: relative;
  z-index: 9796 !important;
}

.onboarding-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9790;
  pointer-events: auto;
  background: rgba(15, 23, 42, .36);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

body.onboarding-open {
  overflow: hidden;
}

body.onboarding-open .milestone-floating,
body.onboarding-open .milestone-show-btn,
body.onboarding-open .achievement-stack,
body.onboarding-open .career-fab,
body.onboarding-open .career-fab-panel {
  display: none !important;
}

.site-footer {
  margin: 1rem auto .85rem;
  max-width: 960px;
  padding: 0 1rem;
  font-size: .78rem;
  color: var(--semester-label);
  display: flex;
  gap: .35rem;
  align-items: center;
  justify-content: center;
}

.site-footer a {
  color: inherit;
  font-weight: 700;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1080px) {
  body > header {
    grid-template-columns: 1fr;
    align-items: start;
    gap: .75rem;
  }

  .header-controls {
    min-width: 0;
    justify-items: stretch;
  }

  .career-picker {
    justify-content: flex-start;
  }

  .career-picker select {
    width: 100%;
  }

  .semester-label {
    align-self: flex-start;
  }

  .career-progress-floating {
    width: min(540px, calc(100vw - 1.5rem));
  }
}

@media (max-width: 768px) {
  body > header {
    padding: 1rem;
    gap: .7rem;
  }

  .title-row {
    flex-wrap: wrap;
    gap: .4rem .6rem;
  }

  .subtitle {
    font-size: .9rem;
  }

  .career-picker {
    display: none;
  }

  .tools-menu {
    min-width: min(92vw, 300px);
  }

  .milestone-floating {
    left: .75rem;
    right: .75rem;
    bottom: 4.45rem;
    max-width: none;
  }

  .achievement-stack {
    right: .75rem;
    left: .75rem;
    top: auto;
    bottom: 11.8rem;
    width: auto;
  }

  .milestone-show-btn {
    right: .75rem;
    left: auto;
    bottom: .75rem;
    width: auto;
  }

  .career-fab {
    display: inline-flex;
    align-items: center;
    left: .75rem;
    bottom: .75rem;
  }

  .career-fab-panel {
    display: block;
    left: .75rem;
    right: .75rem;
    width: auto;
    bottom: 3.45rem;
  }

  .career-hero {
    margin-top: .65rem;
  }

  .view-mode-toggle {
    margin-top: .45rem;
  }

  .career-progress-floating {
    top: .45rem;
    width: calc(100vw - 1.5rem);
    margin-top: .55rem;
  }

  #semesters {
    gap: 1.2rem;
    padding: .2rem 0;
  }

  .semester-block {
    gap: .75rem;
    padding: .7rem;
  }

  .subjects-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: .7rem;
  }

  .subjects-accordion-list {
    grid-template-columns: 1fr;
  }

  .program-item {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .links-list {
    grid-template-columns: 1fr;
  }

  .subject-card {
    width: 100%;
    max-width: none;
  }

  .onboarding-guide {
    width: min(460px, calc(100vw - 1.5rem));
    max-height: calc(100vh - 1.5rem);
  }
}

@media (max-width: 520px) {
  .milestone-floating {
    bottom: 4.25rem;
  }

  .milestone-show-btn,
  .career-fab {
    font-size: .74rem;
    padding: .45rem .75rem;
  }

  .onboarding-actions {
    flex-direction: column;
  }
}

@media (max-width: 360px) {
  .subjects-row {
    grid-template-columns: 1fr;
  }

  .view-mode-toggle {
    padding: 0 .6rem;
  }

  .milestone-floating {
    bottom: 4.1rem;
  }

  .milestone-show-btn {
    bottom: .6rem;
    right: .6rem;
  }

  .career-fab {
    bottom: .6rem;
    left: .6rem;
  }

  .career-fab-panel {
    left: .6rem;
    right: .6rem;
    bottom: 3.15rem;
  }

  .career-progress-head {
    gap: .18rem;
  }
}

/* ── Print ────────────────────────────────────────────────── */
@media print {
  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  :root,
  body,
  body[data-theme="dark"] {
    --bg: #ffffff;
    --text: #020617;
    --semester-label: #475569;
    --color-pending-bg: #f1f5f9;
    --color-pending-border: #94a3b8;
    --color-pending-text: #334155;
    --color-regular-bg: #fefce8;
    --color-regular-border: #ca8a04;
    --color-regular-text: #713f12;
    --color-approved-bg: #f0fdf4;
    --color-approved-border: #16a34a;
    --color-approved-text: #14532d;
    --shadow: none !important;
  }

  body {
    font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg) !important;
    color: var(--text) !important;
    font-size: 8pt; /* Reducir tamaño de fuente base */
  }

  /* 1. Ocultar todos los elementos interactivos y flotantes */
  body > header,
  .milestone-floating,
  .milestone-show-btn,
  .career-fab,
  .career-fab-panel,
  .career-progress-floating,
  .achievement-stack,
  .onboarding-guide,
  .onboarding-backdrop,
  .onboarding-focus,
  .view-mode-toggle,
  #toast,
  .site-footer,
  #arrows-svg {
    display: none !important;
  }

  /* 2. Crear un diseño de informe continuo y compacto */
  main {
    padding: 0;
    max-width: 100%;
  }

  #diagram-container {
    max-width: 100%;
  }

  .print-header {
    display: block !important;
    padding-bottom: 0.5rem;
    border-bottom: 1.5px solid #e2e8f0;
    margin-bottom: 0.8rem;
    text-align: center;
  }

  .print-header h1 {
    font-size: 14pt;
    font-weight: 700;
  }

  .print-header p {
    font-size: 9pt;
    color: #475569;
    margin-top: 0.1rem;
  }

  #semesters {
    display: block;
    padding: 0;
  }

  #semesters-accordion {
    display: none !important;
  }

  .semester-block {
    display: block;
    border: none;
    background: none;
    box-shadow: none;
    margin-bottom: 1rem;
    padding: 0;
    page-break-inside: avoid; /* Intentar no cortar un cuatrimestre */
  }

  .semester-label {
    font-size: 9pt !important;
    padding: .2rem 0 !important;
    border: none;
    border-bottom: 1px solid #94a3b8;
    border-radius: 0;
    background: none;
    text-align: left;
    margin-bottom: 0.6rem;
    color: var(--semester-label) !important;
  }

  .subjects-row {
    display: grid;
    /* Ajustar columnas para que quepan más, pero sin ser demasiado pequeñas */
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.5rem;
  }

  /* 3. Estilizar las tarjetas para el informe */
  .subject-card {
    border-width: 1px;
    box-shadow: none !important;
    transform: none !important;
    padding: .4rem .6rem;
  }

  .subject-card.locked {
    opacity: 1;
    background: #f8fafc !important;
    border-color: #cbd5e1 !important;
    color: #64748b !important;
  }

  .lock-icon {
    display: inline-block;
    font-size: .7rem;
    position: static;
    opacity: 1;
    margin-right: .2rem;
  }

  .subject-name {
    font-size: 7.5pt;
  }

  .subject-status {
    font-size: 6.5pt;
  }

  /* ELIMINAR el salto de página forzado */
  .semester-block:not(:first-child) {
    page-break-before: auto; /* 'auto' es el valor por defecto */
  }
}