/* ═══════════════════════════════════════════════════
   SHOT ON IPHONE: MASTERED — Course Site Stylesheet
═══════════════════════════════════════════════════ */

/* ─── GATE ───────────────────────────────────────── */
.gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: #f8f9ff;
  transition: opacity 0.5s, visibility 0.5s;
}

.gate-back {
  position: absolute;
  top: 1.5rem;
  left: 1.75rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}
.gate-back:hover { color: var(--text); }

.gate.unlocked {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.gate-card {
  width: 100%;
  max-width: 420px;
  padding: 3rem 2.5rem;
  text-align: center;
}

.gate-logo {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.2em;
}

.gate-logo-sep {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.2em;
}

.gate-logo-sep { color: var(--blue); -webkit-text-fill-color: var(--blue); background: none; }

.gate-title {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.025em;
  color: var(--text);
}

.gate-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.gate-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.gate-input-wrap {
  display: flex;
  gap: 0.5rem;
}

.gate-input {
  flex: 1;
  background: var(--bg-2);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.gate-input:focus {
  border-color: var(--blue);
}

.gate-input.error {
  border-color: #f87171;
}

.gate-submit {
  flex-shrink: 0;
  padding: 0.75rem 1.25rem;
}

.gate-error {
  font-size: 0.8rem;
  color: #f87171;
  min-height: 1.2em;
  text-align: left;
}

.gate-help {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.gate-help a {
  color: var(--blue);
}


/* ─── COURSE LAYOUT ──────────────────────────────── */
.course-body {
  margin: 0;
  padding: 0;
  background: var(--bg);
}

.course-layout {
  display: flex;
  min-height: 100vh;
}

/* ─── SIDEBAR ────────────────────────────────────── */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--bg-2);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: transform 0.35s var(--ease-out);
  z-index: 50;
}

.sidebar-header {
  padding: 1.5rem 1.25rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
}

.sidebar-brand {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  align-items: baseline;
  gap: 0.15em;
  color: var(--text);
}

.sidebar-brand-sep {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.1em;
}

.sidebar-brand-sub { color: var(--text-muted); font-size: 0.9em; }

.sidebar-close {
  color: var(--text-dim);
  padding: 0.25rem;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  display: none;
}

.sidebar-close:hover {
  color: var(--text);
  background: var(--glass-bg);
}

.sidebar-nav {
  flex: 1;
  padding: 1.25rem 0;
  overflow-y: auto;
}

.sidebar-section-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 0 1.25rem 0.75rem;
}

.module-list {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0 0.75rem;
}

.module-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  transition: background 0.2s, color 0.2s;
  color: var(--text-muted);
}

.module-link:hover {
  background: var(--glass-bg);
  color: var(--text);
}

.module-link.active {
  background: var(--blue-dim);
  color: var(--text);
  border: 1px solid rgba(96, 165, 250, 0.2);
}

.module-num {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  color: var(--blue);
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.module-name {
  font-size: 0.825rem;
  line-height: 1.4;
}

.sidebar-footer {
  padding: 1.25rem;
  border-top: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex-shrink: 0;
}

.sidebar-preset-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--blue);
  font-weight: 500;
  padding: 0.6rem 0.75rem;
  background: var(--blue-dim);
  border: 1px solid rgba(96,165,250,0.2);
  border-radius: 10px;
  transition: background 0.2s;
}

.sidebar-preset-link:hover {
  background: rgba(96,165,250,0.2);
}

.sidebar-home-link {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-align: center;
  transition: color 0.2s;
}

.sidebar-home-link:hover { color: var(--text-muted); }


/* ─── OPEN BUTTON ────────────────────────────────── */
.sidebar-open-btn {
  display: none;
  position: fixed;
  top: 1.25rem;
  left: 1rem;
  z-index: 60;
  background: rgba(7, 7, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 0.6rem;
  color: var(--text);
  transition: background 0.2s;
}

.sidebar-open-btn:hover {
  background: var(--glass-bg-hover);
}


/* ─── COURSE MAIN ────────────────────────────────── */
.course-main {
  flex: 1;
  overflow-y: auto;
  background: var(--bg);
}


/* ─── MODULES ────────────────────────────────────── */
.module {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) clamp(1.5rem, 4vw, 3rem);
  border-bottom: 1px solid var(--glass-border);
}

.module:last-child {
  border-bottom: none;
}

.module-header {
  margin-bottom: 2.5rem;
}

.module-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  display: block;
  margin-bottom: 0.75rem;
}

.module-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.module-intro {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 62ch;
}

/* Video embed */
.module-video-placeholder {
  position: relative;
  aspect-ratio: 16/9;
  border-radius: var(--glass-radius);
  overflow: hidden;
  background: var(--bg-3);
  border: 1px solid var(--glass-border);
  margin-bottom: 3rem;
}

.module-video-placeholder iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Body content */
.module-body h2 {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 500;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.module-body p {
  margin-bottom: 1.1rem;
  font-size: 1.0125rem;
  line-height: 1.78;
}

.module-body strong {
  color: var(--text);
  font-weight: 500;
}

.module-body a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Image placeholders */
.module-image-placeholder {
  aspect-ratio: 16/9;
  background: var(--glass-bg);
  border: 1px dashed var(--glass-border);
  border-radius: var(--glass-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1.5rem 0;
  padding: 1.5rem;
}

.module-image-placeholder span {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  text-align: center;
  text-transform: uppercase;
}

/* Module lists */
.module-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.module-body ol.module-list { counter-reset: ol-counter; }

.module-body ol.module-list li {
  counter-increment: ol-counter;
  padding-left: 2rem;
  position: relative;
  font-size: 1.0125rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.module-body ol.module-list li::before {
  content: counter(ol-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--blue);
  top: 0.3em;
  letter-spacing: 0.05em;
}

.module-body ul.module-list li {
  padding-left: 1.5rem;
  position: relative;
  font-size: 1.0125rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.module-body ul.module-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--blue);
  font-size: 0.8em;
}

/* Takeaways */
.module-takeaways {
  margin-top: 3rem;
  padding: 2rem;
}

.module-takeaways h3 {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1rem;
  font-weight: 400;
}

.module-takeaways ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.module-takeaways ul li {
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.module-takeaways ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--blue);
  font-size: 0.8em;
  font-weight: 600;
}

/* Module nav */
.module-nav {
  margin-top: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
}

.module-nav .btn {
  font-size: 0.875rem;
}

.module-completion {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-radius: var(--glass-radius-sm) !important;
  flex: 1;
  max-width: 340px;
}

.module-completion > span {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.module-completion strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.module-completion p {
  font-size: 0.8rem;
  margin: 0;
}


/* ─── MOBILE SIDEBAR ─────────────────────────────── */
@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    transform: translateX(-100%);
    box-shadow: 4px 0 40px rgba(0,0,0,0.5);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-close { display: flex; }
  .sidebar-open-btn { display: flex; }

  .course-main {
    padding-top: 0;
  }

  .module {
    padding-top: 4rem; /* space for hamburger */
  }

  /* Overlay when sidebar is open */
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 40;
  }

  .sidebar-overlay.visible { display: block; }
}

@media (max-width: 480px) {
  .module { padding: 4rem 1.25rem 2rem; }
  .module-title { font-size: 1.75rem; }
  .module-body h2 { font-size: 1.3rem; }
  .module-nav { flex-direction: column; align-items: flex-start; }
  .module-completion { max-width: 100%; }
}