/* ============================================
   HAN KHIM MASTERCLASS — Design System
   Light editorial, warm minimal, premium
   v3.0 — Creative Environment
   ============================================ */

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

:root {
  --bg: #F8F7F4;
  --bg-elevated: #FFFFFF;
  --bg-card: rgba(0,0,0,0.02);
  --bg-card-hover: rgba(0,0,0,0.035);
  --bg-input: #FFFFFF;
  --bg-studio: #F0EFEC;
  --border: rgba(0,0,0,0.06);
  --border-hover: rgba(0,0,0,0.10);
  --border-active: rgba(0,0,0,0.15);
  --border-studio: rgba(0,0,0,0.06);
  --text-primary: #1A1A1A;
  --text-secondary: #6B6B6B;
  --text-tertiary: #9A9A9A;
  --text-muted: #B0ADA8;
  --accent: #1A1A1A;
  --accent-brand: #FF0000;
  --accent-muted: rgba(0,0,0,0.04);
  --status-complete: #2D8C4E;
  --status-current: #1A1A1A;
  --status-locked: rgba(0,0,0,0.12);
  --status-pending: #C17E1A;
  --space-xs: 4px; --space-sm: 10px; --space-md: 18px; --space-lg: 28px;
  --space-xl: 48px; --space-2xl: 72px; --space-3xl: 112px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'DM Mono', 'SF Mono', monospace;
  --container-max: 1120px; --container-narrow: 680px;
  --nav-height: 56px; --radius: 10px; --radius-lg: 14px;
  --ease-out: cubic-bezier(0.25,1,0.5,1);
  --ease-in-out: cubic-bezier(0.4,0,0.2,1);
  --duration-micro: 120ms; --duration-sm: 140ms; --duration-md: 180ms; --duration-modal: 180ms;
}

html { font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-body); background: var(--bg); color: var(--text-primary); line-height: 1.5; min-height: 100vh; }

/* ── Khmer Language Typography ───────────────────────────────────────────── */
/* Applied when html[lang="km"] via STATE.lang toggle */
html[lang="km"] body,
html[lang="km"] p,
html[lang="km"] .page-desc,
html[lang="km"] .module-desc,
html[lang="km"] .lesson-page-desc,
html[lang="km"] .info-text,
html[lang="km"] .lesson-action-text,
html[lang="km"] .lesson-desc,
html[lang="km"] .resource-card-desc,
html[lang="km"] .feedback-text,
html[lang="km"] .sidebar-lesson span,
html[lang="km"] .lesson-title { font-family: 'Noto Sans Khmer', sans-serif; line-height: 1.8; }

html[lang="km"] h1,
html[lang="km"] h2,
html[lang="km"] h3,
html[lang="km"] h4,
html[lang="km"] .page-title,
html[lang="km"] .lesson-page-title,
html[lang="km"] .module-title,
html[lang="km"] .resource-card-title,
html[lang="km"] .resource-section-title,
html[lang="km"] .next-action-title { font-family: 'Koulen', 'Noto Sans Khmer', sans-serif; letter-spacing: 0.02em; font-weight: 400; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; border: none; outline: none; background: none; }

.mono-label { font-family: var(--font-mono); font-size: 10px; font-weight: 400; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); opacity: 0.5; }
.mono-sm { font-family: var(--font-mono); font-size: 10px; font-weight: 400; letter-spacing: 0.10em; text-transform: uppercase; color: var(--text-muted); opacity: 0.5; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-lg); }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--space-lg); }

/* NAVBAR */
.navbar { position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height); background: rgba(248,247,244,0.92); backdrop-filter: blur(24px) saturate(1.2); -webkit-backdrop-filter: blur(24px) saturate(1.2); border-bottom: 1px solid rgba(0,0,0,0.04); z-index: 100; }
.navbar-inner { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-lg); height: 100%; display: flex; align-items: center; justify-content: space-between; }
.navbar-brand { font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: 0.24em; text-transform: uppercase; color: #1A1A1A; }
.navbar-links { display: flex; gap: var(--space-lg); }
.nav-link { font-size: 13px; font-weight: 400; color: var(--text-tertiary); transition: color var(--duration-sm) var(--ease-out); letter-spacing: 0.01em; }
.nav-link:hover { color: var(--text-secondary); }
.nav-link.active { color: var(--accent-brand); }
.navbar-right { display: flex; align-items: center; gap: var(--space-md); }
.tier-badge { font-family: var(--font-mono); font-size: 9px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-secondary); padding: 5px 12px; border: 1px solid rgba(0,0,0,0.08); border-radius: 100px; background: transparent; }
/* Language toggle */
.lang-toggle { display: flex; align-items: center; gap: 4px; }
.lang-btn { font-family: var(--font-mono); font-size: 9px; font-weight: 500; letter-spacing: 0.12em; background: none; border: none; padding: 4px 2px; cursor: pointer; color: var(--text-tertiary); transition: color var(--duration-sm); line-height: 1; }
.lang-btn.active { color: var(--text-primary); }
.lang-btn:hover:not(.active) { color: var(--text-secondary); }
.lang-sep { font-family: var(--font-mono); font-size: 9px; color: var(--text-tertiary); user-select: none; }
/* Resources dynamic content */
.resource-section { margin-bottom: var(--space-2xl); }
.resource-section-title { margin-bottom: var(--space-lg); }
.resource-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-lg); display: flex; justify-content: space-between; align-items: flex-end; gap: var(--space-lg); }
.resource-card-body { flex: 1; min-width: 0; }
.resource-card-title { font-size: 15px; font-weight: 600; margin-bottom: var(--space-xs); }
.resource-card-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.5; margin-bottom: var(--space-sm); }
.resource-meta { color: var(--text-tertiary); }
.resources-empty { padding: var(--space-2xl) 0; text-align: center; color: var(--text-secondary); }
.navbar-menu { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.navbar-menu span { display: block; width: 18px; height: 1.5px; background: #1A1A1A; }
.mobile-menu { display: flex; position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0; background: #F8F7F4; z-index: 99; flex-direction: column; padding: var(--space-xl) var(--space-lg); opacity: 0; transform: translateY(-6px); pointer-events: none; transition: opacity var(--duration-md) var(--ease-out), transform var(--duration-md) var(--ease-out); }
.mobile-menu.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
.mobile-link { font-size: 24px; font-weight: 300; padding: var(--space-md) 0; color: var(--text-primary); border-bottom: 1px solid rgba(0,0,0,0.04); transition: color var(--duration-sm) var(--ease-out); opacity: 0; transform: translateY(4px); }
.mobile-menu.open .mobile-link { opacity: 1; transform: translateY(0); transition: opacity var(--duration-sm) var(--ease-out), transform var(--duration-sm) var(--ease-out), color var(--duration-sm) var(--ease-out); }
.mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 40ms; }
.mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 80ms; }
.mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 120ms; }
.mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 160ms; }
.mobile-menu-footer { margin-top: auto; padding-top: var(--space-lg); }

/* PAGE SYSTEM */
.page { display: none; padding-top: var(--nav-height); min-height: 100vh; }
.page.active { display: block; }
.page.page-entering { display: block; opacity: 0; transform: translateY(8px); }
.page.page-entering.page-visible { opacity: 1; transform: translateY(0); transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out); }

/* SECTIONS */
.section { padding: var(--space-2xl) 0; }
.section-welcome { padding-top: var(--space-3xl); padding-bottom: var(--space-xl); }
.section-header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: var(--space-xl); }
.section-title { font-size: 10px; font-weight: 400; letter-spacing: 0.12em; text-transform: uppercase; font-family: var(--font-mono); color: var(--text-tertiary); opacity: 0.6; }
.section-link { color: var(--text-muted); font-size: 10px; letter-spacing: 0.06em; opacity: 0.6; transition: color var(--duration-micro) var(--ease-out), opacity var(--duration-micro) var(--ease-out); }
.section-link:hover { opacity: 1; color: var(--text-secondary); }

/* WELCOME */
.welcome-name { font-size: 48px; font-weight: 200; letter-spacing: -0.04em; margin-top: var(--space-md); line-height: 1.05; color: var(--text-primary); }
.welcome-subtitle { font-size: 14px; font-weight: 400; color: var(--text-muted); margin-top: var(--space-lg); letter-spacing: 0.01em; font-style: italic; opacity: 0.7; }
.welcome-meta { display: flex; align-items: center; gap: var(--space-md); margin-top: var(--space-xl); }
.meta-divider { width: 1px; height: 10px; background: rgba(0,0,0,0.10); }

/* PROGRESS BAR */
.progress-bar-container { width: 100%; }
.progress-bar-track { width: 100%; height: 1.5px; background: rgba(0,0,0,0.05); border-radius: 1px; overflow: hidden; }
.progress-bar-fill {
  height: 100%;
  background: var(--accent-brand);
  border-radius: 1px;
  transition: width 0.5s var(--ease-out) 180ms;
  box-shadow: 0 0 6px 1px rgba(255,0,0,0.5);
  animation: progress-pulse 2.8s ease-in-out infinite;
}

@keyframes progress-pulse {
  0%, 100% { box-shadow: 0 0 4px 1px rgba(255,0,0,0.35); }
  50%       { box-shadow: 0 0 12px 3px rgba(255,0,0,0.7); }
}
.progress-meta { display: flex; justify-content: space-between; margin-top: var(--space-sm); }
.progress-meta .mono-sm:last-child {
  color: var(--accent-brand);
  animation: progress-text-pulse 2.8s ease-in-out infinite;
}
@keyframes progress-text-pulse {
  0%, 100% { text-shadow: 0 0 4px rgba(255,0,0,0.3); }
  50%       { text-shadow: 0 0 12px rgba(255,0,0,0.75); }
}

/* NEW USER */
.new-user-only { display: none; }
[data-new-user="true"] .new-user-only { display: block; }
.start-here-card { background: transparent; border: none; padding: var(--space-xl) 0; }
.start-here-header { margin-bottom: var(--space-xl); }
.start-here-title { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin-top: var(--space-sm); }
.start-here-desc { font-size: 14px; color: var(--text-secondary); margin-top: var(--space-sm); }
.start-here-steps { display: flex; flex-direction: column; gap: var(--space-lg); }
.start-step { display: flex; align-items: flex-start; gap: var(--space-lg); padding: var(--space-lg); border-radius: var(--radius); border: 1px solid transparent; }
.start-step.active { background: rgba(0,0,0,0.015); border-color: rgba(0,0,0,0.04); }
.start-step-num { width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--border-hover); display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 500; color: var(--text-tertiary); flex-shrink: 0; }
.start-step.completed .start-step-num { border-color: var(--status-complete); color: var(--status-complete); }
.start-step.active .start-step-num { border-color: var(--text-primary); color: var(--text-primary); }
.step-check { font-size: 11px; }
.start-step-title { font-size: 14px; font-weight: 500; }
.start-step.completed .start-step-title { color: var(--text-secondary); }
.start-step-desc { font-size: 13px; color: var(--text-tertiary); margin-top: 2px; }

/* NEXT ACTION */
.next-action-card { background: #222222; border: none; border-radius: 20px; padding: var(--space-2xl) var(--space-2xl) var(--space-xl); position: relative; color: #FFFFFF; margin: var(--space-3xl) 0 var(--space-2xl); transition: transform var(--duration-micro) var(--ease-out); }
.next-action-card:hover { transform: scale(1.007); }
.next-action-card:active { transform: scale(0.988); }
.next-action-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-xl); }
.next-action-content { flex: 1; }
.next-action-card .mono-label { color: var(--accent-brand); opacity: 0.7; }
.next-action-title { font-size: 32px; font-weight: 300; letter-spacing: -0.03em; margin-top: var(--space-md); line-height: 1.15; color: #FFFFFF; }
.next-action-then { font-size: 14px; color: rgba(255,255,255,0.45); margin-top: var(--space-sm); line-height: 1.5; }
.next-action-btn { display: inline-flex; align-items: center; padding: 14px 36px; background: #FFFFFF; color: #1A1A1A; font-size: 14px; font-weight: 600; letter-spacing: 0.02em; border-radius: var(--radius); transition: opacity var(--duration-micro) var(--ease-out), transform var(--duration-micro) var(--ease-out); white-space: nowrap; }
.next-action-btn:hover { opacity: 0.92; }
.next-action-btn:active { transform: scale(0.97); }
.next-action-progress { margin-top: var(--space-xl); height: 1px; background: rgba(255,255,255,0.08); border-radius: 1px; overflow: hidden; }
.next-action-progress-fill { height: 100%; background: rgba(255,255,255,0.25); border-radius: 1px; }

/* MODULE GRID */
.module-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl) var(--space-2xl); }
.module-card { display: flex; flex-direction: column; background: transparent; border: none; border-radius: 0; padding: 0; transition: opacity var(--duration-micro) var(--ease-out), transform var(--duration-micro) var(--ease-out); }
a.module-card:hover { opacity: 0.85; transform: translateY(-2px) scale(1.006); }
.module-card.completed { opacity: 0.6; }
.module-card.completed:hover { opacity: 0.75; }
.module-card.locked { opacity: 0.35; cursor: not-allowed; }
.module-card.locked:hover { transform: none; }
.module-card.completed .module-status { color: var(--status-complete); }
.module-card.current .module-status { color: var(--accent-brand); }
.module-number { color: var(--text-tertiary); opacity: 0.8; }
.module-title { font-size: 18px; font-weight: 500; letter-spacing: -0.02em; margin-top: 6px; }
.module-desc { font-size: 12px; color: var(--text-secondary); margin-top: 6px; line-height: 1.45; flex: 1; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; opacity: 0.7; }
.module-footer { display: flex; justify-content: space-between; align-items: center; margin-top: var(--space-md); padding-top: var(--space-sm); opacity: 0.6; }

/* RESOURCE PREVIEW CARD */
.resource-preview-card {
  background: rgba(0,0,0,0.028);
  border-radius: 16px;
  padding: var(--space-lg) var(--space-xl);
}
.resource-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}
.resource-preview-title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-primary);
}

/* RESOURCE ROW */
.resource-row { display: flex; flex-direction: column; gap: 0; }
.resource-card { background: transparent; border: none; padding: var(--space-sm) 0; display: flex; align-items: baseline; gap: var(--space-xl); opacity: 1; transition: opacity var(--duration-micro) var(--ease-out), transform var(--duration-micro) var(--ease-out); cursor: pointer; }
.resource-card:hover { opacity: 0.7; transform: translateX(2px); }
.resource-title { font-size: 12px; font-weight: 400; margin-top: 0; color: var(--text-muted); white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.resource-icon { width: 13px; height: 13px; flex-shrink: 0; opacity: 0.55; }
.resource-desc { font-size: 11px; color: var(--text-muted); margin-top: 0; opacity: 0.8; }

/* STUDIO SECTION */
.studio-section { background: #EDECEA; border: none; border-radius: 24px; padding: var(--space-2xl) var(--space-2xl) var(--space-xl); margin-top: var(--space-2xl); position: relative; overflow: hidden; }
.studio-section::before { content: ''; position: absolute; top: 0; left: 15%; right: 15%; height: 1px; background: linear-gradient(90deg, transparent, rgba(0,0,0,0.04), transparent); }
.studio-header { margin-bottom: var(--space-xl); }
.studio-label { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-md); }
.studio-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--status-complete); box-shadow: 0 0 6px rgba(45,140,78,0.3); }
.studio-title { font-size: 24px; font-weight: 300; letter-spacing: -0.02em; color: var(--text-primary); }
.studio-desc { font-size: 14px; color: var(--text-secondary); margin-top: var(--space-sm); max-width: 480px; }
.studio-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
.studio-grid .studio-card:first-child { grid-column: 1 / -1; }
.studio-card { display: flex; flex-direction: column; background: rgba(255,255,255,0.4); border: none; border-radius: var(--radius-lg); padding: var(--space-xl) var(--space-lg); transition: background var(--duration-micro) var(--ease-out); }
.studio-card:hover { background: rgba(255,255,255,0.6); }
.studio-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-md); }
.studio-card-icon { font-size: 22px; color: var(--text-secondary); }
.studio-card-badge { color: var(--status-complete); }
.studio-card-title { font-size: 15px; font-weight: 500; margin-bottom: var(--space-sm); }
.studio-card-desc { font-size: 13px; color: var(--text-tertiary); line-height: 1.6; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.studio-card-cta { display: block; margin-top: var(--space-md); color: var(--text-tertiary); transition: color var(--duration-micro) var(--ease-out); }
.studio-card:hover .studio-card-cta { color: var(--text-primary); }

/* BACK LINK */
.back-link { display: inline-block; color: var(--text-tertiary); margin-bottom: var(--space-lg); transition: color var(--duration-micro) var(--ease-out); }
.back-link:hover { color: var(--text-secondary); }

/* PAGE TITLES */
.page-title { font-size: 40px; font-weight: 200; letter-spacing: -0.03em; margin-top: var(--space-sm); line-height: 1.1; }
.page-desc { font-size: 15px; color: var(--text-secondary); margin-top: var(--space-md); max-width: 560px; line-height: 1.6; }

/* MODULE HERO */
.section-module-hero { padding-top: var(--space-3xl); padding-bottom: var(--space-lg); }
.module-progress-block { margin-top: var(--space-xl); max-width: 400px; }
.module-progress-block .progress-bar-track { margin-bottom: var(--space-sm); }

/* LESSON LIST */
.lesson-list { display: flex; flex-direction: column; gap: 1px; background: rgba(0,0,0,0.025); border-radius: var(--radius-lg); overflow: hidden; }
.lesson-block { display: flex; align-items: center; gap: var(--space-lg); padding: var(--space-lg) var(--space-xl); background: var(--bg-elevated); transition: background var(--duration-micro) var(--ease-out), transform var(--duration-micro) var(--ease-out); }
a.lesson-block:hover { background: rgba(0,0,0,0.02); transform: translateX(2px); }
.lesson-block.locked { opacity: 0.4; cursor: not-allowed; }
.lesson-block.current { background: rgba(0,0,0,0.02); }
.lesson-block.completed .lesson-status { color: var(--status-complete); }
.lesson-block.current .lesson-status { color: var(--accent-brand); }
.lesson-num { color: var(--text-muted); min-width: 28px; }
.lesson-info { flex: 1; }
.lesson-title { font-size: 15px; font-weight: 500; }
.lesson-desc { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }
.lesson-status { min-width: 90px; text-align: right; }
.lesson-duration { min-width: 60px; text-align: right; }
.lesson-check { font-size: 13px; color: var(--status-complete); min-width: 90px; text-align: right; font-family: var(--font-mono); }

/* LESSON PAGE */
.section-lesson { padding-top: calc(var(--nav-height) + var(--space-xl)); }
.lesson-layout { display: grid; grid-template-columns: 1fr 320px; gap: var(--space-2xl); align-items: start; }
.video-container { width: 100%; aspect-ratio: 16/9; border-radius: 16px; overflow: hidden; background: rgba(0,0,0,0.04); }
.video-container iframe { display: block; width: 100%; height: 100%; border: none; }
.video-placeholder { width: 100%; aspect-ratio: 16/9; background: rgba(0,0,0,0.05); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-sm); }
.video-placeholder.small { aspect-ratio: 16/9; max-width: 240px; border-radius: var(--radius); border: 1px solid var(--border); }
.video-play { width: 60px; height: 60px; border-radius: 50%; border: 1px solid rgba(0,0,0,0.08); display: flex; align-items: center; justify-content: center; font-size: 18px; color: var(--text-tertiary); transition: border-color var(--duration-micro) var(--ease-out); }
.video-container:hover .video-play { border-color: rgba(0,0,0,0.18); }
.video-play.small { width: 36px; height: 36px; font-size: 12px; }
.lesson-action-block { margin-top: var(--space-xl); border-top: 1px solid rgba(0,0,0,0.06); padding: var(--space-lg) 0; }
.lesson-action-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); }
.lesson-action-info { flex: 1; }
.lesson-action-text { font-size: 14px; color: var(--text-secondary); margin-top: var(--space-sm); line-height: 1.5; }

/* COMPLETE BUTTON */
.btn-complete { display: inline-flex; align-items: center; justify-content: center; padding: 14px 36px; background: transparent; color: var(--text-primary); font-size: 14px; font-weight: 600; letter-spacing: 0.01em; border: 1px solid rgba(0,0,0,0.15); border-radius: var(--radius); transition: background 280ms var(--ease-out), color 280ms var(--ease-out), border-color 280ms var(--ease-out), transform 100ms var(--ease-out); white-space: nowrap; cursor: pointer; }
.btn-complete:hover { background: #1A1A1A; color: #FFFFFF; border-color: #1A1A1A; }
.btn-complete:active { transform: scale(0.97); }
.btn-complete.completing { transform: scale(0.95); background: var(--status-complete); color: #FFFFFF; border-color: var(--status-complete); pointer-events: none; }
.btn-complete.completed { background: var(--status-complete); color: #FFFFFF; border-color: var(--status-complete); transform: scale(1); pointer-events: none; }
.btn-complete.completed .btn-complete-label::before { content: '✓ '; }

/* LESSON NAV */
.lesson-nav { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); margin-top: var(--space-lg); }
.lesson-nav-btn { display: block; padding: var(--space-md) 0; border-top: 1px solid rgba(0,0,0,0.06); transition: border-color var(--duration-micro) var(--ease-out); }
.lesson-nav-btn:hover { border-color: rgba(0,0,0,0.12); }
.lesson-nav-btn.next { text-align: right; }
.lesson-nav-title { display: block; font-size: 14px; font-weight: 500; margin-top: 4px; color: var(--text-primary); }
.lesson-info-panel { background: transparent; }
.lesson-page-title { font-size: 20px; font-weight: 500; letter-spacing: -0.02em; margin-top: var(--space-sm); line-height: 1.25; }
.lesson-page-desc { font-size: 13px; color: var(--text-muted); margin-top: var(--space-md); line-height: 1.6; }
.info-block { margin-top: var(--space-lg); padding-top: var(--space-lg); border-top: 1px solid rgba(0,0,0,0.05); }
.info-label { margin-bottom: var(--space-sm); }
.info-text { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.lesson-sidebar-list { margin-top: var(--space-xl); border-top: 1px solid rgba(0,0,0,0.06); padding: var(--space-lg) 0 0; }
.lesson-sidebar-list h4 { margin-bottom: var(--space-md); }
.sidebar-lessons { display: flex; flex-direction: column; gap: 1px; }
.sidebar-lesson { display: flex; align-items: center; gap: var(--space-md); padding: var(--space-sm) 0; font-size: 13px; color: var(--text-secondary); transition: color var(--duration-micro) var(--ease-out); }
.sidebar-lesson:hover { color: var(--text-primary); }
.sidebar-lesson.active { color: var(--text-primary); font-weight: 500; }
.sidebar-lesson.completed { color: var(--status-complete); }
.sidebar-lesson.locked { opacity: 0.3; pointer-events: none; }
.sidebar-lesson.just-unlocked { color: var(--text-primary); font-weight: 500; animation: sidebarHighlight 600ms var(--ease-out); }
@keyframes sidebarHighlight { 0% { opacity: 0.5; transform: translateX(-4px); } 100% { opacity: 1; transform: translateX(0); } }
.sidebar-check { margin-left: auto; font-size: 11px; font-family: var(--font-mono); }

/* SUBMIT PAGE */
.submit-intent { display: flex; align-items: flex-start; gap: var(--space-lg); margin-top: var(--space-3xl); margin-bottom: var(--space-2xl); padding: var(--space-xl) 0; }
.submit-intent-icon { font-size: 20px; color: var(--text-tertiary); flex-shrink: 0; margin-top: 2px; }
.submit-intent-title { font-size: 22px; font-weight: 300; letter-spacing: -0.02em; line-height: 1.3; }
.submit-intent-desc { font-size: 13px; color: var(--text-secondary); margin-top: var(--space-sm); line-height: 1.6; }
.submit-form { margin-top: var(--space-xl); }
.form-group { margin-bottom: var(--space-lg); }
.form-label { display: block; margin-bottom: var(--space-sm); }
.form-input, .form-textarea { width: 100%; padding: var(--space-md); background: var(--bg-input); border: 1px solid rgba(0,0,0,0.06); border-radius: var(--radius); color: var(--text-primary); font-size: 14px; transition: border-color var(--duration-micro) var(--ease-out); }
.form-input:focus, .form-textarea:focus { border-color: rgba(0,0,0,0.14); }
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-hint { display: block; margin-top: var(--space-xs); color: var(--text-muted); }
.form-note { margin-top: var(--space-lg); color: var(--text-muted); }

/* BUTTONS */
.btn-primary { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; background: var(--text-primary); color: var(--bg); font-size: 14px; font-weight: 600; letter-spacing: 0.01em; border-radius: var(--radius); transition: opacity var(--duration-micro) var(--ease-out), transform var(--duration-micro) var(--ease-out); width: 100%; }
.btn-primary:hover { opacity: 0.88; }
.btn-primary:active { transform: scale(0.97); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-ghost { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; background: transparent; color: var(--text-secondary); font-size: 14px; font-weight: 500; border: 1px solid var(--border); border-radius: var(--radius); transition: border-color var(--duration-micro) var(--ease-out), color var(--duration-micro) var(--ease-out); width: 100%; }
.btn-ghost:hover { border-color: var(--border-hover); color: var(--text-primary); }
.btn-download { padding: 10px 20px; border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-secondary); font-size: 13px; font-weight: 500; transition: border-color var(--duration-micro) var(--ease-out), color var(--duration-micro) var(--ease-out); white-space: nowrap; }
.btn-download:hover { border-color: var(--border-hover); color: var(--text-primary); }

/* FEEDBACK */
.feedback-list { margin-top: var(--space-xl); display: flex; flex-direction: column; gap: var(--space-lg); }
.feedback-card { border-bottom: 1px solid rgba(0,0,0,0.06); }
.feedback-header { display: flex; align-items: start; justify-content: space-between; padding: var(--space-lg) 0; }
.feedback-title { font-size: 16px; font-weight: 600; margin: var(--space-xs) 0; }
.feedback-badge { padding: 4px 10px; border-radius: 4px; white-space: nowrap; }
.feedback-badge.reviewed { background: rgba(74,222,128,0.1); color: var(--status-complete); border: 1px solid rgba(74,222,128,0.2); }
.feedback-badge.pending { background: rgba(245,158,11,0.1); color: var(--status-pending); border: 1px solid rgba(245,158,11,0.2); }
.feedback-body { padding: 0 0 var(--space-lg); display: flex; gap: var(--space-xl); }
.feedback-video-preview { flex-shrink: 0; }
.feedback-content { flex: 1; }
.feedback-content h4 { margin-bottom: var(--space-sm); }
.feedback-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: var(--space-sm); }
.feedback-text.muted { color: var(--text-tertiary); font-style: italic; }
.feedback-improvements { margin-top: var(--space-xl); padding: var(--space-lg); background: rgba(0,0,0,0.015); border-radius: var(--radius); }
.feedback-improvements h4 { margin-bottom: var(--space-lg); }
.improvements-list { list-style: none; counter-reset: improvements; display: flex; flex-direction: column; gap: var(--space-md); }
.improvements-list li { counter-increment: improvements; display: flex; align-items: baseline; gap: var(--space-md); font-size: 14px; color: var(--text-secondary); line-height: 1.65; }
.improvements-list li::before { content: counter(improvements); font-family: var(--font-mono); font-size: 9px; font-weight: 500; color: var(--text-tertiary); min-width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; border: 1px solid rgba(0,0,0,0.10); border-radius: 50%; flex-shrink: 0; }
.feedback-empty { text-align: center; padding: var(--space-3xl) var(--space-lg); color: var(--text-secondary); }
.feedback-empty .mono-sm { display: block; margin-bottom: var(--space-sm); }

/* RESOURCES PAGE */
.resource-section { margin-top: var(--space-2xl); }
.resource-section .section-title { margin-bottom: var(--space-lg); }
.resource-grid { display: flex; flex-direction: column; gap: 1px; background: rgba(0,0,0,0.025); border-radius: var(--radius-lg); overflow: hidden; }
.resource-dl-card { display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); padding: var(--space-lg); background: var(--bg-card); }
.resource-dl-info { flex: 1; }
.resource-dl-title { font-size: 15px; font-weight: 600; }
.resource-dl-desc { font-size: 13px; color: var(--text-secondary); margin-top: 2px; margin-bottom: var(--space-xs); }
.resource-usage { color: var(--text-tertiary); margin-bottom: var(--space-sm); font-size: 10px; padding: 4px 8px; background: rgba(0,0,0,0.03); border-radius: 4px; display: inline-block; }

/* MODALS */
.locked-modal, .resource-modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.75); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); z-index: 200; align-items: center; justify-content: center; padding: var(--space-lg); }
.locked-modal.open, .resource-modal.open { display: flex; animation: modalBackdropIn var(--duration-modal) var(--ease-out) both; }
.locked-modal-inner, .resource-modal-inner { background: var(--bg-elevated); border: 1px solid rgba(0,0,0,0.08); border-radius: 16px; padding: var(--space-2xl) var(--space-xl); max-width: 400px; width: 100%; text-align: center; }
.resource-modal-inner { max-width: 480px; text-align: left; }
.locked-modal.open .locked-modal-inner, .resource-modal.open .resource-modal-inner { animation: modalContentIn var(--duration-modal) var(--ease-out) 50ms both; }
.locked-modal-icon, .locked-modal-title, .locked-modal-text { margin-bottom: var(--space-sm); }
.locked-modal-icon { font-size: 28px; color: var(--text-tertiary); }
.locked-modal-title { font-size: 18px; font-weight: 600; }
.locked-modal-text { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: var(--space-xl); }
.locked-modal-btn { max-width: 200px; margin: 0 auto; }
.resource-modal-title { font-size: 20px; font-weight: 600; letter-spacing: -0.02em; margin-top: var(--space-sm); margin-bottom: var(--space-lg); }
.resource-modal-usage { margin-bottom: var(--space-lg); }
.resource-modal-usage h4 { margin-bottom: var(--space-sm); }
.resource-modal-text { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.resource-modal-actions { display: flex; flex-direction: column; gap: var(--space-sm); margin-top: var(--space-xl); padding-top: var(--space-lg); border-top: 1px solid rgba(0,0,0,0.06); }
.expiry-modal { position: fixed; inset: 0; z-index: 1000; display: none; align-items: center; justify-content: center; background: rgba(0,0,0,0.8); backdrop-filter: blur(8px); }
.expiry-modal.open { display: flex; animation: modalBackdropIn var(--duration-modal) var(--ease-out) both; }
.expiry-modal-inner { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-xl); max-width: 420px; width: 90%; text-align: center; }
.expiry-modal.open .expiry-modal-inner { animation: modalContentIn var(--duration-modal) var(--ease-out) 50ms both; }
.expiry-modal-icon { font-size: 32px; color: var(--status-pending); margin-bottom: var(--space-md); }
.expiry-modal-title { font-size: 22px; font-weight: 600; margin-bottom: var(--space-sm); }
.expiry-modal-text { color: var(--text-secondary); font-size: 14px; line-height: 1.6; margin-bottom: var(--space-lg); }
.expiry-modal-btn { margin-bottom: var(--space-sm); }

/* TIER */
[data-tier="1"] .tier-2-only { display: none !important; }
[data-tier="2"] .tier-1-only { display: none !important; }

/* ACCESS STATES */
[data-tier].access-expired .module-card:not(.completed),
[data-tier].access-expired .next-action-card,
[data-tier].access-expired .studio-section,
[data-tier].access-expired .submit-form,
[data-tier].access-expired .btn-complete { opacity: 0.4; pointer-events: none; }
.access-warning .meta-days, .access-warning .mobile-menu-footer .mono-sm { color: var(--status-pending) !important; }

/* MOBILE STICKY */
.mobile-sticky-action { display: none; }

/* SUCCESS TOAST */
.success-toast { position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%) translateY(6px); display: flex; align-items: center; gap: var(--space-sm); padding: 12px 24px; background: var(--bg-elevated); border: 1px solid rgba(74,222,128,0.25); border-radius: var(--radius); box-shadow: 0 2px 12px rgba(0,0,0,0.06); z-index: 900; opacity: 0; pointer-events: none; transition: opacity var(--duration-sm) var(--ease-out), transform var(--duration-sm) var(--ease-out); }
.success-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.toast-check { color: var(--status-complete); font-size: 16px; font-weight: 700; }
.toast-label { color: var(--text-primary); font-size: 14px; font-weight: 500; }

/* MOMENTUM */
.momentum-message { margin-top: var(--space-md); font-size: 14px; color: var(--text-secondary); font-style: italic; min-height: 20px; }
.momentum-message[data-type="welcome"] { color: var(--text-secondary); }
.momentum-message[data-type="urgency"] { color: var(--status-pending); }
.momentum-message[data-type="complete"] { color: var(--status-complete); }
.momentum-message[data-type="strong"] { color: var(--text-primary); }

/* ANIMATIONS */
@keyframes modalBackdropIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalContentIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

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

/* MOBILE */
@media (max-width: 768px) {
  :root { --space-xl: 32px; --space-2xl: 52px; --space-3xl: 80px; }
  .navbar-links { display: none; }
  .navbar-menu { display: flex; }
  .welcome-name { font-size: 32px; }
  .welcome-meta { flex-wrap: wrap; gap: var(--space-sm); }
  .meta-divider { display: none; }
  .next-action-inner { flex-direction: column; align-items: flex-start; }
  .next-action-btn { width: 100%; justify-content: center; }
  .module-grid { grid-template-columns: 1fr; gap: var(--space-2xl) 0; }
  .studio-grid { grid-template-columns: 1fr; }
  .studio-title { font-size: 22px; }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-info-col { order: 2; }
  .lesson-action-inner { flex-direction: column; align-items: flex-start; }
  .btn-complete:not(.mobile-complete) { width: 100%; }
  .mobile-sticky-action { display: block; position: fixed; bottom: 0; left: 0; right: 0; padding: var(--space-md) var(--space-lg); background: rgba(248,247,244,0.94); backdrop-filter: blur(24px); border-top: 1px solid rgba(0,0,0,0.06); z-index: 90; }
  .mobile-sticky-action .mobile-complete { width: 100%; }
  #page-lesson .section-lesson { padding-bottom: 80px; }
  .lesson-block { flex-wrap: wrap; gap: var(--space-sm); }
  .lesson-duration { display: none; }
  .feedback-body { flex-direction: column; }
  .video-placeholder.small { max-width: 100%; }
  .submit-intent { flex-direction: column; gap: var(--space-md); }
  .resource-dl-card { flex-direction: column; align-items: flex-start; }
  .page-title { font-size: 28px; }
}

@media (max-width: 480px) {
  .module-grid { grid-template-columns: 1fr; }
  .lesson-nav { grid-template-columns: 1fr; }
  .welcome-name { font-size: 28px; }
  .container, .container-narrow { padding: 0 var(--space-md); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .page.page-entering, .page.page-entering.page-visible { opacity: 1; transform: none; transition: none; }
  .mobile-menu, .mobile-menu.open, .mobile-link, .mobile-menu.open .mobile-link { transition: none; transform: none; opacity: 1; }
  .success-toast { transform: translateX(-50%); }
  .next-action-card:hover, .next-action-card:active, a.module-card:hover, a.lesson-block:hover, .resource-card:hover, .btn-complete:active, .btn-complete.completing, .btn-primary:active, .next-action-btn:active { transform: none; }
  .sidebar-lesson.just-unlocked { animation: none; }
}

/* ============================================
   LOGIN SCREEN
   ============================================ */
.login-screen {
  position: fixed; inset: 0;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: var(--space-lg);
}
.login-screen.visible { display: flex; }

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 48px 40px 40px;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Logo image — used in navbar and login card
   PNG is 1050×1050 with ~41% whitespace top/bottom, ~10% left/right.
   We render it large then clip with negative margins to show just the wordmark. */
.logo {
  display: block;
  height: 110px;
  width: auto;
}

.navbar-brand {
  display: flex;
  align-items: center;
  overflow: hidden;
  line-height: 0;
}
.navbar-brand .logo {
  height: 110px;
  margin: -44px -10px -44px -11px;
}

.login-brand {
  line-height: 0;
  overflow: hidden;
}
.login-brand .logo {
  height: 130px;
  margin: -52px -12px -52px -13px;
}

.login-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.login-brand {
  font-family: 'Playfair Display', serif;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.login-lang { display: flex; align-items: center; gap: 4px; }

.login-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}

.login-form { display: flex; flex-direction: column; gap: var(--space-md); }

.login-field { display: flex; flex-direction: column; gap: 8px; }

.login-field label {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
}

.login-field input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg-input);
  font-family: inherit;
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.15s;
}
.login-field input:focus { border-color: var(--border-active); }

.login-error {
  font-size: 12px;
  color: #C0392B;
  min-height: 16px;
  line-height: 1.4;
}

.login-btn { width: 100%; margin-top: 4px; }

.login-help {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.02em;
}

/* Logout button */
.logout-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 5px 10px;
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.logout-btn:hover { border-color: var(--border-active); color: var(--text-primary); }
html[data-auth="true"] .logout-btn { display: inline-flex; align-items: center; }

@media (max-width: 768px) {
  .login-card { padding: 36px 24px 28px; }
  .logout-btn { font-size: 9px; padding: 4px 8px; }
}