/* ==========================================================================
   NOCTURNE — Architectural & Editorial Studio Stylesheet
   Zero icons. Pure typography, hairline geometry, and gallery restraint.
   ========================================================================== */

:root {
  --bg-void: #08080a;
  --bg-studio: #0c0d10;
  --bg-panel: #121318;
  --bg-elevated: #181a20;
  --border-hairline: rgba(255, 255, 255, 0.09);
  --border-active: rgba(255, 255, 255, 0.38);
  --text-primary: #eceae4;
  --text-secondary: #9a9890;
  --text-muted: #585752;
  --accent-warm: #d8b888;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

button, input, select {
  font-family: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

/* ==========================================================================
   FULL-VIEWPORT STAGE
   ========================================================================== */

#stage-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-void);
}

#art-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Exhibition status whisper */
.status-whisper {
  position: fixed;
  top: 28px;
  left: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(236, 234, 228, 0.45);
  pointer-events: none;
  transition: opacity 0.8s ease;
  z-index: 10;
}

.status-whisper.hidden {
  opacity: 0;
}

.status-sep {
  opacity: 0.35;
}

/* ==========================================================================
   TYPOGRAPHIC FLOATING ACTION MENU (FAB) — ZERO ICONS
   ========================================================================== */

.fab-container {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.fab-container.visible,
.fab-container.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.fab-trigger {
  height: 44px;
  padding: 0 24px;
  background: rgba(12, 13, 16, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.fab-trigger:hover,
.fab-container.open .fab-trigger {
  background: rgba(24, 26, 32, 0.95);
  border-color: rgba(255, 255, 255, 0.55);
}

.fab-menu {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-width: 164px;
  background: rgba(12, 13, 16, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-hairline);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.fab-container.open .fab-menu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.fab-action {
  padding: 13px 20px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-hairline);
  transition: color 0.2s ease, background 0.2s ease;
}

.fab-action:last-child {
  border-bottom: none;
}

.fab-action:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.fab-action[data-action="create"] {
  color: var(--accent-warm);
  font-weight: 400;
}

.fab-export-group {
  position: relative;
  border-bottom: 1px solid var(--border-hairline);
}

.fab-export-group .fab-action {
  width: 100%;
  border-bottom: none;
}

.fab-submenu {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border-hairline);
  background: rgba(8, 8, 10, 0.9);
}

.fab-submenu.open {
  display: grid;
}

.fab-subaction {
  padding: 10px 6px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
  border-right: 1px solid var(--border-hairline);
  transition: color 0.2s ease, background 0.2s ease;
}

.fab-subaction:last-child {
  border-right: none;
}

.fab-subaction:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   FULL-SCREEN BLIND COMPOSITION STUDIO MODAL
   ========================================================================== */

.studio-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg-studio);
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.studio-modal.open {
  opacity: 1;
  pointer-events: auto;
}

/* Header */
.studio-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border-hairline);
  background: var(--bg-panel);
  flex-shrink: 0;
}

.studio-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.studio-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--text-primary);
}

.studio-subtitle {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--text-muted);
}

.studio-header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.text-btn {
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: 1px solid var(--border-hairline);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.text-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-active);
}

.unveil-btn {
  padding: 11px 26px;
  background: var(--text-primary);
  color: var(--bg-void);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  transition: background 0.25s ease, transform 0.15s ease;
}

.unveil-btn:hover {
  background: var(--accent-warm);
}

/* Main Body */
.studio-body {
  flex: 1;
  display: grid;
  grid-template-columns: 360px 1fr;
  min-height: 0;
  overflow: hidden;
}

/* Left Rail: Layer Stack */
.studio-stack-pane {
  border-right: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg-studio);
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

.layer-stack-list {
  flex: 1;
  overflow-y: auto;
  divide-y: 1px solid var(--border-hairline);
}

.stack-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border-hairline);
  cursor: pointer;
  transition: background 0.18s ease;
}

.stack-item.is-veil {
  padding: 9px 24px 9px 38px;
  background: rgba(255, 255, 255, 0.012);
}

.stack-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

.stack-item.active {
  background: rgba(216, 184, 136, 0.08);
  border-left: 2px solid var(--accent-warm);
}

.stack-item-left {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.stack-swatch {
  width: 22px;
  height: 14px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  flex-shrink: 0;
}

.stack-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stack-name {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.stack-item.is-veil .stack-name {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--text-secondary);
}

.stack-item.disabled .stack-name {
  color: var(--text-muted);
  text-decoration: line-through;
}

.stack-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

.stack-toggle-btn {
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  border: 1px solid var(--border-hairline);
  color: var(--text-muted);
  transition: all 0.18s ease;
}

.stack-toggle-btn.on {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.35);
}

/* Right Pane: Inspector */
.studio-inspector-pane {
  overflow-y: auto;
  padding: 36px 48px 80px;
  background: var(--bg-studio);
}

.inspector-content {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.inspector-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 18px;
}

.inspector-title-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.inspector-category {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  color: var(--accent-warm);
  text-transform: uppercase;
}

.inspector-title {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.inspector-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-hairline);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* ==========================================================================
   GRADUATED ARCHITECTURAL SLIDERS
   ========================================================================== */

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 22px 32px;
}

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

.control-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.control-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.control-readout {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-primary);
  letter-spacing: 0.08em;
}

.graduated-slider-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.graduated-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.18);
  outline: none;
  cursor: ew-resize;
}

.graduated-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 18px;
  background: var(--text-primary);
  border: 1px solid var(--bg-void);
  cursor: ew-resize;
  transition: background 0.15s ease, transform 0.15s ease;
}

.graduated-slider::-webkit-slider-thumb:hover {
  background: var(--accent-warm);
  transform: scaleY(1.15);
}

.graduated-slider::-moz-range-thumb {
  width: 10px;
  height: 18px;
  border-radius: 0;
  background: var(--text-primary);
  border: 1px solid var(--bg-void);
  cursor: ew-resize;
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  padding: 0 4px;
  pointer-events: none;
}

.slider-tick {
  width: 1px;
  height: 4px;
  background: rgba(255, 255, 255, 0.14);
}

.slider-tick.major {
  height: 7px;
  background: rgba(255, 255, 255, 0.28);
}

/* Segmented Option Buttons & Date Input */
.segmented-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.segment-btn {
  flex: 1;
  min-width: 68px;
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: 1px solid var(--border-hairline);
  background: var(--bg-panel);
  text-align: center;
  transition: all 0.18s ease;
}

.segment-btn:hover {
  color: var(--text-primary);
}

.segment-btn.active {
  color: var(--bg-void);
  background: var(--text-primary);
  border-color: var(--text-primary);
}

.studio-date-input {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  color-scheme: dark;
}

/* ==========================================================================
   FIGMA-GRADE COLOR & MULTI-STOP GRADIENT STUDIO
   ========================================================================== */

.gradient-studio {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.gradient-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.gradient-bar-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.gradient-preview-track {
  position: relative;
  height: 28px;
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  cursor: crosshair;
}

.gradient-stops-rail {
  position: relative;
  height: 22px;
  width: 100%;
}

.gradient-stop-handle {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  padding: 3px 6px;
  font-family: var(--font-mono);
  font-size: 9px;
  background: var(--bg-elevated);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--text-secondary);
  cursor: grab;
  user-select: none;
}

.gradient-stop-handle.active {
  border-color: var(--accent-warm);
  color: var(--text-primary);
  background: #24262f;
  z-index: 2;
}

.stop-editor-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  align-items: end;
  padding-top: 8px;
  border-top: 1px solid var(--border-hairline);
}

.color-well-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.native-color-well {
  -webkit-appearance: none;
  appearance: none;
  width: 36px;
  height: 30px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: none;
  cursor: pointer;
}

.native-color-well::-webkit-color-swatch-wrapper {
  padding: 0;
}

.native-color-well::-webkit-color-swatch {
  border: none;
}

.hex-input {
  width: 92px;
  padding: 7px 10px;
  background: var(--bg-studio);
  border: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
}

/* ==========================================================================
   FOOTER & MOBILE ADAPTATION
   ========================================================================== */

.studio-footer {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-top: 1px solid var(--border-hairline);
  background: var(--bg-panel);
}

.footer-note {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.toast-notice {
  position: fixed;
  bottom: 32px;
  left: 32px;
  z-index: 200;
  padding: 12px 20px;
  background: rgba(12, 13, 16, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.22);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-primary);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast-notice.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .studio-header {
    padding: 14px 18px;
  }

  .studio-subtitle {
    display: none;
  }

  .studio-header-actions .unveil-btn {
    display: none;
  }

  .studio-body {
    grid-template-columns: 1fr;
    grid-template-rows: 195px 1fr;
  }

  .studio-stack-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-hairline);
  }

  .studio-inspector-pane {
    padding: 22px 18px 40px;
  }

  .studio-footer {
    display: flex;
  }

  .footer-note {
    display: none;
  }

  .studio-footer .unveil-btn {
    width: 100%;
    text-align: center;
  }

  .fab-container {
    bottom: 20px;
    right: 20px;
  }

  .status-whisper {
    top: 18px;
    left: 18px;
  }
}