/* ── CSS Custom Properties ── */
:root {
  --sky:            #000000;
  --glass-facade:   #0a1628;
  --floor-slab:     #0d1117;
  --interior-ceil:  #080d14;
  --elevator-shaft: #151e2d;
  --text-primary:   #e2e8f0;
  --text-secondary: #64748b;
  --panel-bg:       rgba(5, 8, 15, 0.88);
  --panel-border:   rgba(255, 255, 255, 0.06);
  --modal-bg:       rgba(5, 8, 15, 0.95);
  --font:           'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --lobby:     #e2e8f0;
  --personal:  #d946ef;
  --education: #06b6d4;
  --career:    #3b82f6;
  --startups:  #f59e0b;
  --projects:  #f43f5e;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; background: #000; font-family: var(--font); color: var(--text-primary); }

/* ── Canvas ── */
#tower-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  display: block;
}

/* ── Enter Screen Keyframes ── */
@keyframes enterScreenReveal {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes enterItemReveal {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes scanLine {
  from { transform: translateY(-5%); opacity: 0.8; }
  to   { transform: translateY(105vh); opacity: 0; }
}

/* ── Enter Screen ── */
#enter-screen {
  position: fixed; inset: 0; z-index: 100;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 20px;
  background: #000;
  overflow: hidden;
  animation: enterScreenReveal 0.6s ease forwards;
  transition: opacity 0.8s ease;
}
#enter-screen::before {
  content: '';
  position: absolute; left: 0; right: 0; top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.5), transparent);
  animation: scanLine 1.4s ease 0.1s forwards;
  pointer-events: none;
}
#enter-screen.hidden { opacity: 0; pointer-events: none; animation: none; }
#enter-screen.hidden::before { display: none; }

#enter-name {
  font-family: var(--font); font-size: 2.8rem; font-weight: 300;
  letter-spacing: 0.35em; text-transform: uppercase;
  color: #e2e8f0;
  margin: 0 0 12px 0;
  text-shadow: 0 0 40px rgba(226, 232, 240, 0.15);
  animation: enterItemReveal 0.8s ease 0.2s both;
}

#enter-btn {
  font-family: var(--font); font-size: 1.1rem; font-weight: 500;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: #00d4ff;
  background: transparent;
  border: 1px solid rgba(0, 212, 255, 0.3);
  padding: 16px 48px; cursor: pointer;
  transition: border-color 0.3s, background 0.3s, text-shadow 0.3s;
  text-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
  animation: enterItemReveal 0.8s ease 0.5s both;
}
#enter-btn:hover {
  border-color: rgba(0, 212, 255, 0.7);
  background: rgba(0, 212, 255, 0.06);
  text-shadow: 0 0 16px rgba(0, 212, 255, 0.6);
}

#enter-hint {
  font-size: 0.75rem; font-weight: 400;
  color: rgba(0, 212, 255, 0.5);
  letter-spacing: 0.03em;
  animation: enterItemReveal 0.6s ease 0.7s both;
}


#enter-acknowledgements {
  margin-top: 32px;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  animation: enterItemReveal 0.6s ease 0.9s both;
}

#ack-title {
  font-size: 0.7rem; font-weight: 500;
  color: rgba(0, 212, 255, 0.4);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 4px;
}

.ack-line {
  font-size: 0.85rem; font-weight: 400;
  color: rgba(0, 212, 255, 0.7);
  letter-spacing: 0.02em;
  min-height: 1.3em;
}

/* ── Floor Panel (Desktop) ── */
#floor-panel {
  position: fixed; left: 0; top: 0; width: 280px; height: 100vh;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid var(--panel-border);
  display: flex; flex-direction: column;
  z-index: 20;
  transform: translateX(-100%);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
#floor-panel.visible { transform: translateX(0); }

#panel-header {
  padding: 24px 20px 16px;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.2em; color: var(--text-secondary);
}

#floor-list {
  flex: 1; overflow-y: auto; padding: 0 12px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}

.section-group { margin-bottom: 4px; }

.section-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px; cursor: pointer; border-radius: 6px;
  font-size: 0.8rem; font-weight: 500; color: var(--text-secondary);
  transition: background 0.2s;
  user-select: none;
}
.section-header:hover { background: rgba(255,255,255,0.04); }

.section-dot {
  width: 8px; height: 8px; border-radius: 50%;
  flex-shrink: 0;
}

.chevron {
  margin-left: auto; font-size: 0.7rem;
  transition: transform 0.2s;
}
.section-group.collapsed .chevron { transform: rotate(-90deg); }
.section-group.collapsed .section-floors { display: none; }

.section-floors { padding-left: 16px; }

.floor-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px; cursor: pointer; border-radius: 4px;
  font-size: 0.8rem; color: var(--text-primary);
  border-left: 2px solid transparent;
  transition: background 0.2s, border-color 0.2s;
}
.floor-item:hover { background: rgba(255,255,255,0.04); }
.floor-item.active { border-left-color: currentColor; background: rgba(255,255,255,0.06); }

.floor-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--text-secondary);
  flex-shrink: 0;
}

#panel-footer {
  padding: 12px 16px; display: flex; gap: 8px;
  border-top: 1px solid var(--panel-border);
}

#all-floors-btn {
  flex: 1; padding: 8px; font-family: var(--font); font-size: 0.75rem;
  font-weight: 500; letter-spacing: 0.05em;
  color: var(--text-primary); background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 6px;
  cursor: pointer; transition: background 0.2s;
}
#all-floors-btn:hover { background: rgba(255,255,255,0.1); }

#mute-btn, #sheet-mute-btn {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  font-size: 1rem; background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 6px;
  cursor: pointer; color: var(--text-primary);
  transition: background 0.2s;
}
#mute-btn:hover, #sheet-mute-btn:hover { background: rgba(255,255,255,0.1); }
#mute-btn.muted, #sheet-mute-btn.muted {
  border-color: rgba(239, 68, 68, 0.4);
  color: #ef4444;
}

/* ── Bottom Sheet (Mobile) ── */
#bottom-sheet {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: 70vh;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--panel-border);
  border-radius: 16px 16px 0 0;
  z-index: 20;
  transform: translateY(calc(100% - 48px));
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: none;
}
#bottom-sheet.expanded { transform: translateY(0); }

#sheet-handle {
  display: flex; justify-content: center; padding: 12px 0 8px;
  cursor: grab;
}
#sheet-pill {
  width: 32px; height: 4px; border-radius: 2px;
  background: rgba(255,255,255,0.15);
}

#sheet-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px 12px;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.2em; color: var(--text-secondary);
}

#sheet-list {
  flex: 1; overflow-y: auto; padding: 0 12px 24px;
  max-height: calc(70vh - 80px);
}

/* ── Modal ── */
#modal-overlay {
  position: fixed; inset: 0; z-index: 50;
  display: none; align-items: center; justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
#modal-overlay.visible { display: flex; }

#modal-panel {
  width: min(560px, 90vw);
  max-height: 80vh;
  background: var(--modal-bg);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  overflow: hidden;
  display: flex; flex-direction: column;
}

#modal-header {
  display: flex; align-items: center; gap: 12px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--panel-border);
}

#modal-accent {
  width: 3px; height: 20px; border-radius: 2px;
  flex-shrink: 0;
}

#modal-title {
  flex: 1; font-size: 1rem; font-weight: 500;
}

#modal-close {
  width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; background: transparent; border: none;
  color: var(--text-secondary); cursor: pointer; border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}
#modal-close:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }

#modal-body {
  padding: 20px;
  overflow-y: auto;
  font-size: 0.9rem; line-height: 1.6;
  color: var(--text-primary);
}

/* Modal content types */
.coming-soon {
  text-align: center; padding: 40px 20px;
  color: var(--text-secondary); font-size: 0.9rem;
  animation: pulse-opacity 2s ease-in-out infinite;
}
@keyframes pulse-opacity {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.modal-link-btn {
  display: inline-block; padding: 14px 32px;
  font-family: var(--font); font-size: 0.9rem; font-weight: 500;
  color: var(--text-primary); background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15); border-radius: 8px;
  text-decoration: none; transition: background 0.2s;
}
.modal-link-btn:hover { background: rgba(255,255,255,0.14); }

/* ── Chat ── */
#chat-container {
  position: fixed; bottom: 0; right: 24px;
  width: 380px; z-index: 30;
  display: none; flex-direction: column;
  transition: height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
#chat-container.visible { display: flex; }
#chat-container.collapsed { height: 48px; }
#chat-container.expanded { height: 520px; }

#chat-tab {
  height: 48px; display: flex; align-items: center; justify-content: center;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-bottom: none;
  border-radius: 12px 12px 0 0;
  font-size: 0.8rem; font-weight: 500; color: var(--text-secondary);
  cursor: pointer; transition: background 0.2s;
}
#chat-tab:hover { background: rgba(5, 8, 15, 0.95); }

#chat-box {
  flex: 1; display: none; flex-direction: column;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-top: none;
  overflow: hidden;
}
#chat-container.expanded #chat-box { display: flex; }

#chat-messages {
  flex: 1; overflow-y: auto; padding: 16px;
  display: flex; flex-direction: column; gap: 12px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}

.chat-msg {
  max-width: 85%; padding: 10px 14px;
  font-size: 0.85rem; line-height: 1.5;
  border-radius: 12px;
}
.chat-msg.jeff {
  align-self: flex-start;
  background: rgba(255,255,255,0.06);
  border-bottom-left-radius: 4px;
}
.chat-msg.user {
  align-self: flex-end;
  background: rgba(59, 130, 246, 0.2);
  border-bottom-right-radius: 4px;
}

#chat-input-row {
  display: flex; gap: 8px; padding: 12px;
  border-top: 1px solid var(--panel-border);
}

#chat-input {
  flex: 1; padding: 10px 14px;
  font-family: var(--font); font-size: 0.85rem;
  color: var(--text-primary); background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 8px;
  outline: none; transition: border-color 0.2s;
}
#chat-input:focus { border-color: rgba(255,255,255,0.2); }
#chat-input::placeholder { color: var(--text-secondary); }

#chat-send {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-family: var(--font);
  color: var(--text-primary); background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 8px;
  cursor: pointer; transition: background 0.2s;
}
#chat-send:hover { background: rgba(255,255,255,0.1); }

/* ── Chat FAB (Mobile) ── */
#chat-fab {
  position: fixed; bottom: 64px; right: 16px;
  width: 56px; height: 56px; border-radius: 50%;
  display: none; align-items: center; justify-content: center;
  font-size: 1.4rem; background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  cursor: pointer; z-index: 25;
  backdrop-filter: blur(12px);
}

/* ── HUD ── */
#hud {
  position: fixed; top: 24px; left: 50%; transform: translateX(-50%);
  z-index: 15; pointer-events: none;
  text-align: center;
}

#floor-label {
  font-size: 0.85rem; font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  opacity: 0; transition: opacity 0.4s;
}
#floor-label.visible { opacity: 1; }

#floor-label .subtitle {
  display: block; font-size: 0.7rem; font-weight: 400;
  color: var(--text-secondary); margin-top: 2px;
}

/* ── Easter Egg Auth ── */
#overlay-prompt {
  position: fixed; inset: 0; z-index: 60;
  display: none; align-items: center; justify-content: center; gap: 8px;
  background: rgba(0, 0, 0, 0.4);
}
#overlay-prompt.visible { display: flex; }

#prompt-input {
  width: 200px; padding: 12px 16px;
  font-family: var(--font); font-size: 1rem;
  color: var(--text-primary); background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12); border-radius: 8px;
  outline: none;
}

#prompt-submit {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--text-primary);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12); border-radius: 8px;
  cursor: pointer;
}

/* ── Admin Notify ── */
#admin-notify {
  position: fixed; top: 24px; right: 24px; z-index: 70;
  padding: 10px 20px; font-size: 0.8rem; font-weight: 500;
  color: var(--text-primary); background: var(--panel-bg);
  border: 1px solid var(--panel-border); border-radius: 8px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.4s;
}
#admin-notify.visible { opacity: 1; }

/* ── Mobile ── */
@media (max-width: 767px) {
  #floor-panel { display: none !important; }
  #bottom-sheet { display: flex; flex-direction: column; }
  #chat-container { display: none !important; }
  #chat-fab { display: flex; }
  #hud { top: 12px; }
}

@media (min-width: 768px) {
  #bottom-sheet { display: none !important; }
  #chat-fab { display: none !important; }
}