/* ============================================================
   OUROBOROS — Immersive Media Engine
   sirensinfull.com | sirensinfull.github.io
   ============================================================ */

/* --- FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700;900&family=Crimson+Pro:ital,wght@0,300;0,400;0,600;1,300;1,400&family=JetBrains+Mono:wght@300;400;500;600&display=swap');

/* --- VARIABLES --- */
:root {
  --bg-void: #07090e;
  --bg-deep: #0c0f18;
  --bg-panel: #121727;
  --bg-panel-header: #0a0e1a;
  --bg-input: #1a2038;
  --accent-gold: #c9a84c;
  --accent-gold-dim: #8a7234;
  --accent-gold-glow: #c9a84c44;
  --accent-cyan: #4ecdc4;
  --accent-cyan-dim: #2a7a74;
  --accent-rose: #c44a6c;
  --text-primary: #e8e0d4;
  --text-secondary: #9a9590;
  --text-muted: #5a5652;
  --border-subtle: #1e2540;
  --border-active: #c9a84c55;
  --radius-panel: 12px;
  --radius-btn: 6px;
  --shadow-panel: 0 8px 40px rgba(0,0,0,0.6), 0 0 1px rgba(201,168,76,0.1);
  --shadow-glow: 0 0 20px rgba(201,168,76,0.15);
  --font-brand: 'Cinzel', serif;
  --font-body: 'Crimson Pro', serif;
  --font-mono: 'JetBrains Mono', 'Consolas', 'Menlo', monospace;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body {
  background: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-mono);
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  position: relative;
}

/* --- GRAIN OVERLAY (texture) --- */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.5;
}

/* --- BACKGROUND LAYERS --- */
#slideshowBg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.bg-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: opacity 2s ease;
  opacity: 0;
}

#rgbOverlayCanvas {
  position: fixed !important;
  inset: 0;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 1 !important;
  pointer-events: none;
  opacity: 0.35;
  background: transparent !important;
  image-rendering: pixelated;
}

/* ============================================================
   LANDING OVERLAY — The Entrance
   ============================================================ */
#landingOverlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg-void);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity 1.2s ease, visibility 1.2s ease;
}
#landingOverlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.landing-brand {
  text-align: center;
  animation: landingFadeIn 2s ease forwards;
}
.landing-brand h1 {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 5rem);
  letter-spacing: 0.25em;
  color: var(--accent-gold);
  text-shadow: 0 0 60px rgba(201,168,76,0.25), 0 0 120px rgba(201,168,76,0.08);
  margin-bottom: 0.3em;
  text-transform: uppercase;
}
.landing-brand .landing-sub {
  font-family: var(--font-body);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(0.9rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  margin-bottom: 2.5em;
}
.landing-enter {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  animation: landingPulse 3s ease-in-out infinite;
}

@keyframes landingFadeIn {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes landingPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ============================================================
   NAVIGATION
   ============================================================ */
#siteNav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: linear-gradient(180deg, rgba(7,9,14,0.95) 0%, rgba(7,9,14,0) 100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}
#siteNav.visible {
  opacity: 1;
  pointer-events: auto;
}
.nav-brand {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  text-transform: uppercase;
  text-decoration: none;
  transition: text-shadow var(--transition-smooth);
}
.nav-brand:hover {
  text-shadow: 0 0 20px var(--accent-gold-glow);
}
.nav-links {
  display: flex;
  gap: 1.8em;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-smooth);
  position: relative;
}
.nav-links a:hover {
  color: var(--accent-gold);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-gold);
  transition: width var(--transition-smooth);
}
.nav-links a:hover::after { width: 100%; }

/* ============================================================
   WINDOW SIDEBAR (Panel Restore)
   ============================================================ */
#windowSidebar {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1800;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
  background: rgba(18,23,39,0.85);
  border-radius: 8px 0 0 8px;
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-right: none;
}
#windowSidebar:empty { display: none; }
#windowSidebar button {
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 4px 0 0 4px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 6px 12px 6px 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-smooth);
  letter-spacing: 0.05em;
}
#windowSidebar button:hover {
  background: var(--accent-gold);
  color: var(--bg-void);
  border-color: var(--accent-gold);
}

/* ============================================================
   PANELS — The Window System
   ============================================================ */
.panel {
  position: absolute;
  min-width: 220px;
  min-height: 120px;
  background: var(--bg-panel);
  color: var(--text-primary);
  border-radius: var(--radius-panel);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-panel);
  z-index: 1011;
  user-select: none;
  display: block;
  opacity: 0;
  transform: translateY(10px);
  animation: panelReveal 0.5s ease forwards;
  overflow: hidden;
}
@keyframes panelReveal {
  to { opacity: 1; transform: translateY(0); }
}

.panel.hidden { display: none !important; }
.panel.locked { border-color: var(--accent-gold-dim); }
.panel.dragging { box-shadow: var(--shadow-glow), var(--shadow-panel); z-index: 1050 !important; }

.panel-header {
  cursor: move;
  background: var(--bg-panel-header);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: var(--radius-panel) var(--radius-panel) 0 0;
  padding: 8px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  border-bottom: 1px solid var(--border-subtle);
}
.panel.locked .panel-header { cursor: default; }

.panel-header-controls {
  display: flex;
  gap: 4px;
}
.panel-header-controls button {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 3px;
  transition: all var(--transition-smooth);
  line-height: 1;
}
.panel-header-controls button:hover {
  color: var(--accent-gold);
  background: rgba(201,168,76,0.1);
}

.panel-content {
  padding: 12px 14px;
  max-height: 70vh;
  overflow: auto;
  font-size: 0.8rem;
}
.panel-content::-webkit-scrollbar { width: 4px; }
.panel-content::-webkit-scrollbar-track { background: transparent; }
.panel-content::-webkit-scrollbar-thumb { background: var(--border-subtle); border-radius: 2px; }

.panel-resize-handle {
  position: absolute;
  right: 0; bottom: 0;
  width: 14px; height: 14px;
  cursor: nwse-resize;
  z-index: 2;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}
.panel:hover .panel-resize-handle { opacity: 1; }
.panel-resize-handle::after {
  content: '';
  position: absolute;
  right: 3px; bottom: 3px;
  width: 8px; height: 8px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  border-radius: 0 0 3px 0;
}

/* ============================================================
   CONTROLS PANEL
   ============================================================ */
.controls-row {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 8px;
}
.controls-row:last-child { margin-bottom: 0; }

.btn {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 6px 14px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  white-space: nowrap;
  letter-spacing: 0.03em;
}
.btn:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  box-shadow: 0 0 12px var(--accent-gold-glow);
}
.btn:active { transform: scale(0.97); }
.btn.active {
  background: var(--accent-gold);
  color: var(--bg-void);
  border-color: var(--accent-gold);
}

.btn-icon {
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-size: 1rem;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-smooth);
  padding: 0;
}
.btn-icon:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

/* Range Sliders */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg-input);
  border-radius: 2px;
  outline: none;
  border: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent-gold);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px var(--accent-gold-glow);
  transition: transform 0.15s ease;
}
input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--accent-gold);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

/* Track info */
.track-info {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
  padding: 4px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.track-time {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  margin-top: 2px;
}

/* ============================================================
   PLAYLIST PANEL
   ============================================================ */
#audioPlaylist {
  list-style: none;
  margin: 0;
  padding: 0;
}
#audioPlaylist li {
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 4px;
  margin: 1px 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  transition: all var(--transition-smooth);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#audioPlaylist li:hover {
  background: rgba(201,168,76,0.08);
  color: var(--text-primary);
}
#audioPlaylist li.selected {
  background: rgba(201,168,76,0.12);
  color: var(--accent-gold);
  font-weight: 500;
  border-left: 2px solid var(--accent-gold);
  padding-left: 8px;
}
#audioPlaylist:empty::after {
  content: 'No tracks loaded';
  display: block;
  color: var(--text-muted);
  font-style: italic;
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: 12px 4px;
  text-align: center;
}

/* ============================================================
   VISUALIZER PANEL
   ============================================================ */
#visualizerPanel .panel-content {
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}
#audioVisualizerCanvas {
  flex: 1 1 auto;
  width: 100% !important;
  min-height: 140px;
  background: var(--bg-void);
  display: block;
}
.visualizer-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-panel-header);
  border-top: 1px solid var(--border-subtle);
}
.visualizer-controls select {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 5px 8px;
  cursor: pointer;
}
.visualizer-controls select:focus {
  border-color: var(--accent-gold);
  outline: none;
}

/* Fullscreen Visualizer */
#visualizerPanel.fullscreen {
  position: fixed !important;
  inset: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 2500 !important;
  border-radius: 0 !important;
  border: none !important;
}
#visualizerPanel.fullscreen .panel-header { border-radius: 0; }
#visualizerPanel.fullscreen .panel-content { max-height: 100vh; }
#visualizerPanel.fullscreen #audioVisualizerCanvas {
  min-height: calc(100vh - 80px);
}

/* ============================================================
   OVERLAY (RGB) PANEL
   ============================================================ */
.rgb-control-group {
  display: grid;
  grid-template-columns: 50px 1fr 50px auto;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}
.rgb-control-group label {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.rgb-control-group input[type="range"] {
  min-width: 60px;
}
.rgb-control-group input[type="checkbox"] {
  accent-color: var(--accent-gold);
  cursor: pointer;
}
#rgbOverlayStatus {
  font-size: 0.65rem;
  color: var(--accent-cyan);
  font-style: italic;
  display: block;
  margin-top: 6px;
}

/* ============================================================
   SETTINGS PANEL
   ============================================================ */
#settingsPanel .panel-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.setting-row label {
  font-size: 0.72rem;
  color: var(--text-secondary);
}
.setting-row select {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 5px 8px;
}

/* ============================================================
   SLIDESHOW PANEL
   ============================================================ */
.slideshow-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.slideshow-interval {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  color: var(--text-muted);
}
.slideshow-interval input[type="number"] {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 6px;
  width: 52px;
  text-align: center;
}
.slideshow-count {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 6px;
}

/* ============================================================
   SPEEDREADER PANEL
   ============================================================ */
#speedreaderPanel .panel-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#speedreaderInput {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 8px 10px;
  resize: vertical;
  min-height: 60px;
  line-height: 1.5;
}
#speedreaderInput::placeholder {
  color: var(--text-muted);
  font-style: italic;
}
#speedreaderInput:focus {
  border-color: var(--accent-gold);
  outline: none;
}

.speedreader-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.speedreader-toolbar input[type="number"],
.speedreader-toolbar select {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 5px 8px;
}
.speedreader-toolbar input[type="number"] { width: 65px; }

/* ============================================================
   RSVP OVERLAY — Full Screen Reading Mode
   ============================================================ */
#rsvpOverlay {
  position: fixed;
  inset: 0;
  background: rgba(7,9,14,0.94);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 3000;
  backdrop-filter: blur(4px);
}
#rsvpOverlay.active {
  display: flex;
}

#rsvpWordbox {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  background: rgba(12,15,24,0.8);
  padding: 0.4em 1.2em;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  margin-bottom: 1.5em;
  min-width: 3em;
  text-align: center;
  box-shadow: 0 0 40px rgba(0,0,0,0.5);
}
#rsvpWordbox .orp {
  color: var(--accent-gold);
  text-shadow: 0 0 12px var(--accent-gold-glow);
}

#rsvpControls {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-panel);
  padding: 12px 18px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-panel);
}
#rsvpControls input[type="number"],
#rsvpControls select {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 5px 8px;
}
#rsvpControls input[type="number"] { width: 65px; }

.rsvp-badge {
  display: inline-block;
  background: var(--bg-input);
  color: var(--accent-gold-dim);
  border-radius: 10px;
  padding: 2px 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
}
.rsvp-badge.active {
  color: var(--accent-cyan);
  background: rgba(78,205,196,0.1);
}
.rsvp-progress {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ============================================================
   FOCUS & ACCESSIBILITY
   ============================================================ */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}
:focus:not(:focus-visible) { outline: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  html { font-size: 13px; }
  .panel { min-width: 180px; }
  #siteNav { padding: 8px 12px; }
  .nav-links { gap: 1em; }
}
@media (max-width: 600px) {
  html { font-size: 12px; }
  .panel { min-width: 160px; min-height: 100px; }
  .nav-links { display: none; }
  #windowSidebar { top: auto; bottom: 8px; transform: none; right: 4px; }
}

/* ============================================================
   ANIMATIONS — Panel entrance stagger
   ============================================================ */
.panel:nth-child(1) { animation-delay: 0.05s; }
.panel:nth-child(2) { animation-delay: 0.12s; }
.panel:nth-child(3) { animation-delay: 0.19s; }
.panel:nth-child(4) { animation-delay: 0.26s; }
.panel:nth-child(5) { animation-delay: 0.33s; }
.panel:nth-child(6) { animation-delay: 0.40s; }
.panel:nth-child(7) { animation-delay: 0.47s; }

/* Hidden file inputs */
input[type="file"][hidden] { display: none; }