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

:root {
  --navy:       #0f1f35;
  --navy2:      #162942;
  --navy3:      #0a1728;
  --navy-light: #eef2f7;
  --bg:         #ffffff;
  --bg2:        #f7f5f2;
  --border:     #e8e4dd;
  --text:       #0f1f35;
  --body-text:  #595347;
  --muted:      #7a7264;
  --glow:       rgba(255,255,255,0.055);
  --glow2:      rgba(255,255,255,0.09);
  --serif:      'Playfair Display', Georgia, serif;
  --sans:       'Plus Jakarta Sans', system-ui, sans-serif;
  --radius:     20px;
  --radius-sm:  12px;
  --radius-pill: 100px;
}

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--sans);
  background: var(--bg2);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; outline: none; }
input { font-family: inherit; outline: none; }

/* ─── Animations ───────────────────────────────────────────────────────────── */
@keyframes spin        { to { transform: rotate(360deg); } }
@keyframes pulse-ring  {
  0%   { transform: scale(0.9); opacity: 0.5; }
  70%  { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(1.6); opacity: 0; }
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes shimmer {
  from { left: -100%; }
  to   { left: 160%; }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16,1,0.3,1), transform 0.6s cubic-bezier(0.16,1,0.3,1);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-delay-1 { transition-delay: 0.08s; }
.fade-in-delay-2 { transition-delay: 0.16s; }
.fade-in-delay-3 { transition-delay: 0.24s; }

/* ─── Login Page ───────────────────────────────────────────────────────────── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  background: var(--bg2);
  position: relative;
  overflow: hidden;
}

/* subtle dot-grid on login bg */
.login-page::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(15,31,53,0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.login-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 52px 48px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 8px 48px rgba(15,31,53,0.1);
  position: relative;
  z-index: 1;
  animation: fade-up 0.6s cubic-bezier(0.16,1,0.3,1) both;
}

.login-logo {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 36px;
}

.login-box h1 {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(180deg, #0f1f35 0%, #4a6080 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.login-box .subtitle {
  color: var(--muted);
  margin-bottom: 36px;
  font-size: 0.9rem;
  line-height: 1.6;
}

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.form-group input {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(15,31,53,0.08);
  background: var(--bg);
}

.form-group input::placeholder { color: var(--muted); }

.btn-primary {
  width: 100%;
  background: var(--navy);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  padding: 16px 28px;
  border-radius: var(--radius-pill);
  margin-top: 10px;
  box-shadow: 0 4px 24px rgba(15,31,53,0.22);
  position: relative;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
}

.btn-primary::after {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  transition: left 0.5s ease;
}
.btn-primary:hover::after { left: 160%; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(15,31,53,0.28); }
.btn-primary:active { transform: scale(0.99); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.error-msg {
  color: #c0392b;
  font-size: 0.83rem;
  margin-top: 12px;
  display: none;
}

.magic-link-hint {
  text-align: center;
  margin-top: 22px;
  font-size: 0.82rem;
  color: var(--muted);
}

.magic-link-hint a {
  color: var(--navy);
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ─── App Shell ────────────────────────────────────────────────────────────── */
.app { display: flex; min-height: 100vh; }

/* ─── Sidebar — dark, dot-grid, like landing page dark sections ─────────────── */
.sidebar {
  width: 256px;
  background-color: var(--navy);
  background-image: radial-gradient(circle, rgba(255,255,255,0.055) 1px, transparent 1px);
  background-size: 28px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px 0;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
}

/* top glow */
.sidebar::before {
  content: '';
  position: absolute; top: -80px; left: 50%;
  transform: translateX(-50%);
  width: 300px; height: 280px;
  background: radial-gradient(ellipse at center, var(--glow2) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.sidebar > * { position: relative; z-index: 1; }

.sidebar-logo {
  font-size: 11px;
  font-weight: 700;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0 24px;
  margin-bottom: 32px;
}

.sidebar-section-title {
  font-size: 10px;
  font-weight: 700;
  color: rgba(255,255,255,0.28);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0 24px;
  margin: 20px 0 6px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 24px;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.55);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  border-left: 2px solid transparent;
}

.sidebar-item:hover {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.9);
}

.sidebar-item.active {
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-weight: 700;
  border-left-color: rgba(255,255,255,0.5);
}

.sidebar-item .icon { width: 18px; text-align: center; font-size: 0.9rem; }

.sidebar-week-badge {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 100px;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.4);
  border: 1px solid rgba(255,255,255,0.1);
}

.sidebar-week-badge.done {
  background: rgba(62,207,142,0.15);
  color: #3ecf8e;
  border-color: rgba(62,207,142,0.2);
}

.sidebar-footer {
  margin-top: auto;
  padding: 20px 24px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user { display: flex; align-items: center; gap: 10px; }

.user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.78rem;
  color: rgba(255,255,255,0.85);
  flex-shrink: 0;
}

.user-email {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-logout {
  background: transparent;
  color: rgba(255,255,255,0.28);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 6px 0;
  margin-top: 10px;
  transition: color 0.15s;
  letter-spacing: 0.04em;
}

.btn-logout:hover { color: #ff7675; }

/* ─── Main ──────────────────────────────────────────────────────────────────── */
.main {
  margin-left: 256px;
  flex: 1;
  padding: 52px 60px;
}

/* ─── Dashboard Header ──────────────────────────────────────────────────────── */
.dashboard-header { margin-bottom: 44px; }

.greeting {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.greeting .pill-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--navy);
  position: relative;
  flex-shrink: 0;
}

.greeting .pill-dot::after {
  content: '';
  position: absolute; inset: -3px;
  border-radius: 50%;
  border: 1.5px solid var(--navy);
  opacity: 0.4;
  animation: pulse-ring 2s ease-out infinite;
}

.dashboard-header h1 {
  font-size: clamp(28px, 3.5vw, 40px);
  margin-bottom: 0;
}

.progress-bar-wrap {
  margin-top: 28px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: 0 2px 16px rgba(15,31,53,0.05);
}

.progress-bar-wrap .label {
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}

.progress-track {
  flex: 1;
  height: 4px;
  background: var(--bg2);
  border-radius: 99px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--navy2), var(--navy));
  border-radius: 99px;
  transition: width 0.7s cubic-bezier(0.16,1,0.3,1);
}

.progress-pct {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--navy);
  white-space: nowrap;
}

/* ─── Section Title ─────────────────────────────────────────────────────────── */
.section-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--navy);
  opacity: 0.4;
  margin-bottom: 20px;
}

/* ─── Module Cards ──────────────────────────────────────────────────────────── */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: 16px;
}

.module-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  cursor: pointer;
  transition: box-shadow 0.25s, transform 0.2s, border-color 0.2s;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

/* shimmer on hover */
.module-card::after {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(15,31,53,0.03), transparent);
  transition: left 0.5s ease;
  pointer-events: none;
}

.module-card:hover::after { left: 150%; }
.module-card:hover {
  box-shadow: 0 12px 40px rgba(15,31,53,0.1);
  transform: translateY(-3px);
  border-color: rgba(15,31,53,0.15);
}

.module-card.locked { opacity: 0.4; cursor: not-allowed; }
.module-card.locked:hover { transform: none; box-shadow: none; }

.module-card .week-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--navy);
  opacity: 0.4;
}

.module-card.bonus .week-label { color: #92400e; opacity: 0.7; }

.module-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.module-card p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 0;
}

.module-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

.lesson-count {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
}

.module-progress {
  flex: 1;
  height: 3px;
  background: var(--bg2);
  border-radius: 99px;
  overflow: hidden;
}

.module-progress-fill {
  height: 100%;
  background: var(--navy);
  border-radius: 99px;
  transition: width 0.6s ease;
}

.badge-done {
  font-size: 0.65rem;
  font-weight: 700;
  color: #1a7a4a;
  background: #edfaf4;
  border: 1px solid #b6e8d0;
  padding: 2px 9px;
  border-radius: 100px;
}

/* ─── Lesson Page ──────────────────────────────────────────────────────────── */
.lesson-main { margin-left: 256px; flex: 1; }

.lesson-top {
  padding: 28px 52px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.92);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.15s;
  background: transparent;
  margin-bottom: 12px;
}
.back-btn:hover { color: var(--navy); }

.lesson-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }

.lesson-week-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--navy-light);
  padding: 4px 12px;
  border-radius: 100px;
}

.lesson-top h1 {
  font-size: clamp(20px, 2.5vw, 30px);
}

.video-container {
  background: var(--navy3);
  width: 100%;
  aspect-ratio: 16/9;
  max-height: 520px;
  position: relative;
}

.video-container iframe { width: 100%; height: 100%; border: none; display: block; }

.video-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: rgba(255,255,255,0.3);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--navy);
  background-image: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
}

.lesson-body {
  padding: 40px 52px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 36px;
  background: var(--bg2);
}

.lesson-description h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.lesson-description p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--body-text);
  margin-bottom: 0;
}

.lesson-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 11px 24px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--navy);
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.15s;
}

.btn-nav:hover {
  box-shadow: 0 4px 20px rgba(15,31,53,0.1);
  border-color: rgba(15,31,53,0.2);
  transform: translateY(-1px);
}

.btn-nav.primary {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
  box-shadow: 0 4px 20px rgba(15,31,53,0.22);
  position: relative;
  overflow: hidden;
}

.btn-nav.primary::after {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  transition: left 0.5s ease;
}
.btn-nav.primary:hover::after { left: 160%; }
.btn-nav.primary:hover {
  box-shadow: 0 8px 28px rgba(15,31,53,0.28);
  transform: translateY(-1px);
}

/* ─── Lesson List Sidebar ──────────────────────────────────────────────────── */
.lesson-list {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  height: fit-content;
  box-shadow: 0 2px 16px rgba(15,31,53,0.05);
}

.lesson-list-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.lesson-list-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 20px;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--body-text);
  cursor: pointer;
  transition: background 0.15s;
  border-bottom: 1px solid var(--border);
}

.lesson-list-item:last-child { border-bottom: none; }
.lesson-list-item:hover { background: var(--bg2); }
.lesson-list-item.active {
  background: var(--navy-light);
  color: var(--navy);
  font-weight: 600;
}

.lesson-list-item .check {
  width: 18px; height: 18px; min-width: 18px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.6rem;
  margin-top: 1px;
}

.lesson-list-item .check.done {
  background: var(--navy);
  border-color: var(--navy);
  color: white;
}

.lesson-list-item .check.active-dot { border-color: var(--navy); }

/* ─── Loading ──────────────────────────────────────────────────────────────── */
.loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  flex-direction: column;
  gap: 16px;
  background: var(--bg2);
}

.spinner {
  width: 32px; height: 32px;
  border: 2.5px solid var(--border);
  border-top-color: var(--navy);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ─── Toast ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px; right: 28px;
  background: var(--navy);
  border-radius: var(--radius-sm);
  padding: 13px 22px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
  z-index: 999;
  box-shadow: 0 8px 32px rgba(15,31,53,0.3);
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast .dot { width: 7px; height: 7px; border-radius: 50%; background: #3ecf8e; }

/* ─── Markdown Content ─────────────────────────────────────────────────────── */
.lesson-md { font-size: 0.95rem; line-height: 1.8; color: var(--body-text); }
.lesson-md h1, .lesson-md h2 { font-weight: 800; letter-spacing: -0.025em; color: var(--navy); margin: 2em 0 0.6em; -webkit-text-fill-color: initial; background: none; }
.lesson-md h1 { font-size: 1.5rem; }
.lesson-md h2 { font-size: 1.2rem; }
.lesson-md h3 { font-size: 1rem; font-weight: 700; color: var(--navy); margin: 1.6em 0 0.5em; }
.lesson-md p  { margin-bottom: 1.1em; color: var(--body-text); }
.lesson-md ul, .lesson-md ol { margin: 0.8em 0 1.1em 1.4em; }
.lesson-md li { margin-bottom: 0.4em; color: var(--body-text); }
.lesson-md strong { color: var(--navy); font-weight: 700; }
.lesson-md em { font-style: italic; }
.lesson-md code {
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 7px;
  font-size: 0.85em;
  color: var(--navy);
  font-family: ui-monospace, monospace;
}
.lesson-md pre {
  background: var(--navy);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  overflow-x: auto;
  margin: 1.2em 0;
}
.lesson-md pre code {
  background: none;
  border: none;
  padding: 0;
  color: rgba(255,255,255,0.85);
  font-size: 0.875em;
}
.lesson-md blockquote {
  border-left: 3px solid var(--navy);
  background: var(--navy-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 20px;
  margin: 1.2em 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05em;
  color: var(--navy);
}
.lesson-md hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}
.lesson-md img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
  margin: 1.2em 0;
}

/* ─── Demo Banner ──────────────────────────────────────────────────────────── */
#demo-banner {
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ─── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar { display: none; }
  .main, .lesson-main { margin-left: 0; }
  .main { padding: 28px 24px; }
  .lesson-body { grid-template-columns: 1fr; padding: 28px 24px; }
  .lesson-list { display: none; }
  .lesson-top { padding: 20px 24px; position: static; }
}