/* ════════════════════════════════════════════════════════
   guestbook.css  —  Brutalist Guestbook & DrawBox Canvas
   Theme System: var(--bg), var(--bg-alt), var(--text), var(--border), var(--blue), var(--yellow)
════════════════════════════════════════════════════════ */

body.guestbook-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  overflow-x: clip;
}

/* ════════════════════════════════════════════════════
   HERO SECTION
════════════════════════════════════════════════════ */
#guestbook-hero {
  background: var(--blue, #007BFF);
  color: #ffffff;
  padding: 80px 20px 70px;
  min-height: calc(100vh - 54px);
  min-height: calc(100svh - 54px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

#guestbook-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg,  rgba(255,255,255,0.04) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.04) 25%, transparent 25%),
    linear-gradient(45deg,  transparent 75%, rgba(255,255,255,0.04) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.04) 75%);
  background-size: 40px 40px;
  background-position: 0 0, 0 20px, 20px -20px, -20px 0;
  pointer-events: none;
}

#guestbook-hero .container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1360px;
  padding: 0 20px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: auto 0;
}

.guestbook-eyebrow {
  font-family: monospace;
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--yellow, #ffd600);
  margin-bottom: 16px;
}

#guestbook-hero p {
  font-size: clamp(0.95rem, 1.8vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
  max-width: 680px;
  margin: 18px auto 0;
  line-height: 1.65;
}

/* ════════════════════════════════════════════════════
   STICKY CATEGORY TABS (Header-Following Navigation)
════════════════════════════════════════════════════ */
.category-nav {
  position: sticky;
  top: 54px;
  z-index: 900;
  background: var(--bg);
  border-bottom: 1.5px solid var(--border);
  width: 100%;
  box-sizing: border-box;
  transition: background 0.3s, border-color 0.3s;
}

.category-nav .container {
  padding: 0 12px;
  max-width: 1360px;
  margin: 0 auto;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.category-nav .container::-webkit-scrollbar { display: none; }

.category-nav ul {
  list-style: none;
  display: flex;
  width: max-content;
  min-width: 100%;
  justify-content: center;
  gap: 8px;
  padding: 0 8px;
  margin: 0 auto;
  box-sizing: border-box;
}

.category-nav ul li {
  flex-shrink: 0;
}

.category-nav .nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  font-family: 'BBHBartle', 'SourceHanSansSC', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
  cursor: pointer;
  box-sizing: border-box;
  border-radius: 0px;
}

.category-nav .nav-link:hover {
  color: var(--text);
  background: var(--bg-alt);
}

.category-nav .nav-link.active-link {
  color: var(--blue, #007BFF);
  border-bottom-color: var(--blue, #007BFF);
  background: rgba(0, 123, 255, 0.06);
}

/* ════════════════════════════════════════════════════
   MAIN CONTENT & PANELS
════════════════════════════════════════════════════ */
.gb-section {
  flex: 1 0 auto;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 36px 20px 80px;
  box-sizing: border-box;
}

.gb-panel {
  display: none;
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  border-radius: 0px;
  padding: 32px 28px;
  margin: 0 auto 40px;
  box-sizing: border-box;
  transition: background 0.3s, border-color 0.3s;
}

#panel-message {
  max-width: 660px;
}

#panel-drawbox {
  max-width: 760px;
}

#panel-wall {
  max-width: 1000px;
  background: transparent;
  border: none;
  padding: 0;
}

.gb-panel.active {
  display: block;
  animation: fadeIn 0.22s ease-out both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

.gb-panel-header {
  margin-bottom: 24px;
  border-bottom: 1.5px solid var(--border);
  padding-bottom: 14px;
}

.gb-panel-title {
  font-family: 'BBHBartle', sans-serif;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  margin: 0 0 6px 0;
  color: var(--text);
}

.gb-panel-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

/* ════════════════════════════════════════════════════
   FORM CONTROLS
════════════════════════════════════════════════════ */
.gb-form-group {
  margin-bottom: 20px;
}

.gb-label {
  display: block;
  font-family: 'BBHBartle', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  color: var(--text);
}

.gb-input,
.gb-textarea {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 12px 14px;
  font-size: 0.92rem;
  font-family: 'Roboto', sans-serif;
  outline: none;
  border-radius: 0px;
  box-sizing: border-box;
  transition: border-color 0.2s, background 0.3s;
}

.gb-input:focus,
.gb-textarea:focus {
  border-color: var(--yellow, #ffd600);
}

.gb-textarea {
  resize: vertical;
  min-height: 110px;
  line-height: 1.55;
}

/* AVATAR SELECTOR (No Glow) */
.avatar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  background: var(--bg);
  border: 1.5px solid var(--border);
  padding: 10px 14px;
  box-sizing: border-box;
}

.avatar-picker {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.avatar-opt {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  cursor: pointer;
  border-radius: 0px;
  transition: all 0.15s ease;
  user-select: none;
  box-shadow: none !important;
}

.avatar-opt:hover {
  border-color: var(--blue, #007BFF);
}

.avatar-opt.selected {
  border-color: var(--yellow, #ffd600);
  background: var(--yellow, #ffd600);
  color: #000000;
  box-shadow: none !important;
}

.avatar-or-divider {
  font-family: monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
}

.custom-icon-input {
  width: 50px !important;
  height: 38px !important;
  text-align: center;
  font-size: 1.2rem;
  padding: 0 !important;
  border: 1.5px solid var(--border) !important;
}

/* MEDIA TOOLS ROW */
.media-tools-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: stretch;
  width: 100%;
}

.rec-btn,
.file-upload-label {
  background: var(--bg);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 12px 16px;
  font-family: 'BBHBartle', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-sizing: border-box;
  text-align: center;
  border-radius: 0px;
  box-shadow: none !important;
}

.rec-btn:hover,
.file-upload-label:hover {
  border-color: var(--blue, #007BFF);
  background: var(--bg-alt);
}

.rec-btn.recording {
  background: #ff3366;
  color: #ffffff;
  border-color: #ff3366;
}

/* SUBMIT BUTTON (No Glow) */
.gb-submit-btn {
  width: 100%;
  background: var(--blue, #007BFF);
  color: #ffffff;
  border: 1.5px solid var(--blue, #007BFF);
  padding: 15px 20px;
  font-family: 'BBHBartle', sans-serif;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
  border-radius: 0px;
  box-sizing: border-box;
  box-shadow: none !important;
}

.gb-submit-btn:hover {
  background: var(--yellow, #ffd600);
  color: #000000;
  border-color: var(--yellow, #ffd600);
  box-shadow: none !important;
}

.gb-submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ════════════════════════════════════════════════════
   POLISHED DRAWBOX CANVAS & RATIO WRAPPER
════════════════════════════════════════════════════ */
.drawbox-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.canvas-badge-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  max-width: 640px;
  margin-bottom: 10px;
  padding: 0 4px;
  box-sizing: border-box;
  flex-wrap: wrap;
}

.canvas-ratio-badge {
  font-family: 'BBHBartle', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--blue, #007BFF);
  background: rgba(0, 123, 255, 0.08);
  padding: 6px 12px;
  border: 1.5px solid rgba(0, 123, 255, 0.3);
  white-space: nowrap;
}

.canvas-hint {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-family: 'Roboto', sans-serif;
  white-space: nowrap;
}

.drawbox-canvas-wrap {
  position: relative;
  width: 100%;
  max-width: 640px;
  aspect-ratio: 640 / 380;
  border: 2px solid var(--border);
  background: #ffffff;
  margin-bottom: 20px;
  box-sizing: border-box;
  overflow: hidden;
  transition: max-width 0.25s ease, aspect-ratio 0.25s ease;
}

#draw-canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #ffffff;
  cursor: crosshair;
  touch-action: none;
  box-sizing: border-box;
}

#canvas-cursor-preview {
  position: absolute;
  pointer-events: none;
  border: 1.5px solid #000000;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  display: none;
  z-index: 100;
}

/* DRAWING TOOLBAR */
.draw-toolbar {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-sizing: border-box;
}

.draw-controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  align-items: center;
  background: var(--bg);
  border: 1.5px solid var(--border);
  padding: 14px 16px;
  box-sizing: border-box;
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.brush-shape-picker,
.canvas-size-picker {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.brush-tip-btn,
.canvas-size-btn {
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: 'BBHBartle', sans-serif;
  cursor: pointer;
  border-radius: 0px;
  transition: all 0.18s ease;
  white-space: nowrap;
  box-shadow: none !important;
}

.brush-tip-btn:hover,
.canvas-size-btn:hover {
  border-color: var(--blue, #007BFF);
}

.brush-tip-btn.active,
.canvas-size-btn.active {
  background: var(--yellow, #ffd600);
  color: #000000;
  border-color: var(--yellow, #ffd600);
  box-shadow: none !important;
}

.draw-tool-btn {
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  font-family: 'BBHBartle', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  border-radius: 0px;
  transition: all 0.15s ease;
  box-shadow: none !important;
}

.draw-tool-btn:hover {
  border-color: var(--blue, #007BFF);
}

.draw-tool-btn.active {
  background: var(--yellow, #ffd600);
  color: #000000;
  border-color: var(--yellow, #ffd600);
  box-shadow: none !important;
}

/* 2D BOX COLOR PICKER */
.color-picker-modal-panel {
  background: var(--bg);
  border: 1.5px solid var(--border);
  padding: 16px;
  box-sizing: border-box;
}

.color-box-layout {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  align-items: flex-start;
}

.color-box-picker-wrap {
  position: relative;
  width: 220px;
  user-select: none;
}

#color-box-canvas {
  display: block;
  border: 1px solid var(--border);
  cursor: crosshair;
}

.color-picker-target-circle {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid #ffffff;
  box-shadow: 0 0 3px rgba(0,0,0,0.8);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  top: 70px;
  left: 110px;
}

.hue-gradient-bar-wrap {
  position: relative;
  height: 14px;
  margin-top: 10px;
  cursor: pointer;
}

.hue-gradient-bar {
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, #ff0000 0%, #ffff00 17%, #00ff00 33%, #00ffff 50%, #0000ff 67%, #ff00ff 83%, #ff0000 100%);
  border: 1px solid var(--border);
}

.hue-line-indicator {
  position: absolute;
  top: -2px;
  bottom: -2px;
  width: 4px;
  background: #ffffff;
  border: 1px solid #000000;
  pointer-events: none;
  transform: translateX(-50%);
  left: 0%;
}

.picker-preview-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100px;
}

.active-color-swatch-large {
  height: 60px;
  border: 1.5px solid var(--border);
}

.hex-display-input {
  width: 100%;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: monospace;
  font-size: 0.85rem;
  text-align: center;
  padding: 4px;
  box-sizing: border-box;
}

.preset-palettes-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.palette-category-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.preset-swatch-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.preset-swatch-btn {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0;
  border-radius: 0px;
  transition: transform 0.15s ease, border-color 0.15s ease;
  box-shadow: none !important;
}

.preset-swatch-btn:hover {
  transform: scale(1.15);
  border-color: var(--yellow, #ffd600);
}

/* ════════════════════════════════════════════════════
   CENTERED PUBLIC VISITOR WALL TAG BAR
════════════════════════════════════════════════════ */
.gb-wall-header {
  text-align: center;
  margin-bottom: 20px;
  padding-bottom: 0;
  border-bottom: none;
}

.gb-wall-title {
  font-family: 'BBHBartle', sans-serif;
  font-size: clamp(1.4rem, 3.5vw, 1.8rem);
  font-weight: 800;
  letter-spacing: 0.05em;
  margin: 0 0 6px 0;
  color: var(--text);
  text-align: center;
}

.gb-wall-tag-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 0 auto 32px;
}

.gb-wall-filter-pills {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 auto;
}

.wall-filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  border-radius: 0px;
  color: var(--text);
  font-family: 'BBHBartle', 'SourceHanSansSC', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  white-space: nowrap;
  box-shadow: none !important; /* NO GLOW */
}

.wall-filter-btn:hover {
  background: var(--bg);
  border-color: var(--blue);
  color: var(--blue);
}

.wall-filter-btn.active {
  background: var(--yellow);
  border-color: var(--yellow);
  color: #0d0d0d;
  box-shadow: none !important; /* NO GLOW */
}

.gb-wall-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

/* WALL POST CARD */
.gb-card {
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  border-radius: 0px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease;
  box-sizing: border-box;
  position: relative;
  box-shadow: none !important;
}

.gb-card:hover {
  border-color: var(--yellow, #ffd600);
}

.gb-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gb-card-avatar {
  font-size: 1.8rem;
  line-height: 1;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border: 1.5px solid var(--border);
  flex-shrink: 0;
}

.gb-card-author {
  font-family: 'BBHBartle', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  line-height: 1.2;
}

.gb-card-date {
  font-size: 0.76rem;
  color: var(--text-muted);
  font-family: monospace;
}

.gb-card-text {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text);
  word-break: break-word;
  overflow-wrap: anywhere;
  margin: 0;
}

.gb-card-image {
  width: 100%;
  max-height: 240px;
  object-fit: cover;
  border: 1.5px solid var(--border);
  background: #ffffff;
  cursor: pointer;
}

.gb-audio-player {
  width: 100%;
  height: 36px;
}

.gb-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.like-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0;
  transition: color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.like-btn:hover,
.like-btn.liked {
  color: #ff3366;
}

/* ════════════════════════════════════════════════════
   MODAL LIGHTBOX
════════════════════════════════════════════════════ */
.gb-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  padding: 20px;
  box-sizing: border-box;
}

.gb-modal.active {
  display: flex;
}

.gb-modal-content {
  background: var(--bg);
  border: 1.5px solid var(--border);
  padding: 28px;
  max-width: 600px;
  width: 100%;
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
  box-sizing: border-box;
}

.gb-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: transparent;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 4px;
}

/* ════════════════════════════════════════════════════
   STICKY FOOTER ANCHOR
════════════════════════════════════════════════════ */
.back-to-top-bar {
  margin-top: auto;
}

/* ════════════════════════════════════════════════════
   RESPONSIVE ADJUSTMENTS
════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  #guestbook-hero {
    padding: 50px 16px 36px;
  }
  .gb-section {
    padding: 20px 14px 60px;
  }
  .gb-panel {
    padding: 20px 16px;
  }
  .media-tools-row {
    grid-template-columns: 1fr;
  }
  .category-nav ul {
    gap: 6px;
    padding: 0 4px;
  }
  .category-nav .nav-link {
    padding: 12px 14px;
    font-size: 0.8rem;
    gap: 6px;
  }
  .color-box-layout {
    flex-direction: column;
  }
  .color-box-picker-wrap {
    width: 100%;
    max-width: 220px;
  }
}