/* ==========================================================================
   e-Book Flipbook Styles - มหาวิทยาลัยมหิดล (มม.๒)
   ฉบับปรับปรุงความคมชัดสูงพิเศษ (Ultra-HD) + หน้าปกและสารบัญในเล่มสมบูรณ์
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Prompt:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Sarabun:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Chakra+Petch:wght@400;600&display=swap');

:root {
  --primary: #002b49;           /* Mahidol Royal Navy Blue */
  --primary-rgb: 0, 43, 73;
  --primary-dark: #00182b;
  --accent-gold: #c5a059;        /* Mahidol Gold */
  --accent-gold-light: #f7edd7;
  --accent-gold-hover: #dfba73;
  --book-bg: #1c232d;            /* Reading stage background */
  --toolbar-bg: rgba(0, 43, 73, 0.96);
  --paper-cream: #faf8f5;
  --font-base: 'Sarabun', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Prompt', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-base);
  background: radial-gradient(circle at 50% 40%, #252e3b 0%, #11161d 100%);
  color: #ffffff;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  user-select: none;
  -webkit-user-select: none;
}

/* ==========================================================================
   Top Header Bar
   ========================================================================== */
.ebook-header {
  height: 56px;
  background: var(--toolbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(197, 160, 89, 0.35);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  z-index: 100;
  box-shadow: 0 4px 15px rgba(0,0,0,0.35);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-emblem {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-emblem svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  font-size: 0.74rem;
  color: var(--accent-gold);
  font-weight: 400;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #e2e8f0;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tool-btn:hover {
  background: rgba(197, 160, 89, 0.2);
  border-color: var(--accent-gold);
  color: #ffffff;
}

.tool-btn.highlight {
  background: linear-gradient(135deg, #c5a059, #b08d48);
  color: #002b49;
  font-weight: 600;
  border: none;
  box-shadow: 0 2px 8px rgba(197, 160, 89, 0.4);
}

.tool-btn.highlight:hover {
  background: linear-gradient(135deg, #dfba73, #c5a059);
  transform: translateY(-1px);
}

.tool-btn.active {
  background: var(--accent-gold);
  color: #002b49;
  font-weight: 600;
}

.tool-icon-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.tool-icon-btn:hover {
  background: rgba(197, 160, 89, 0.25);
  border-color: var(--accent-gold);
}

/* ==========================================================================
   Main Flipbook Viewport
   ========================================================================== */
.ebook-viewport {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0.75rem;
}

.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: opacity 0.4s ease;
}

.loading-spinner {
  width: 54px;
  height: 54px;
  border: 4px solid rgba(197, 160, 89, 0.25);
  border-top-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1.25rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.loading-progress-text {
  font-size: 0.88rem;
  color: var(--accent-gold);
}

/* Book Stage Container (Supports Pan & Zoom) */
.book-stage-wrapper {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
}

.book-stage-wrapper.is-zoomed {
  cursor: grab;
}

.book-stage-wrapper.is-panning {
  cursor: grabbing;
}

.book-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 2500px;
  transform-origin: center center;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.flip-book {
  box-shadow: 0 20px 50px rgba(0,0,0,0.7), 0 0 25px rgba(0,0,0,0.4);
  background: #ffffff;
  border-radius: 6px;
  overflow: hidden;
  display: none;
}

/* Page Styling */
.page {
  background-color: var(--paper-cream);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 15px rgba(0,0,0,0.06);
}

.page::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 35px;
  pointer-events: none;
  z-index: 5;
}

.page.--left::after {
  right: 0;
  background: linear-gradient(to left, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.05) 60%, transparent 100%);
}

.page.--right::after {
  left: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.05) 60%, transparent 100%);
}

.page-content {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* Ultra-HD Canvas Styling */
.page-content canvas {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.page-number-badge {
  position: absolute;
  bottom: 8px;
  font-size: 0.72rem;
  color: #718096;
  font-family: var(--font-heading);
  z-index: 6;
  pointer-events: none;
}

.page.--left .page-number-badge {
  left: 14px;
}

.page.--right .page-number-badge {
  right: 14px;
}

.page-corner-hint {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, transparent 50%, rgba(197, 160, 89, 0.45) 50%);
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s;
  z-index: 6;
}

.page-corner-hint:hover {
  opacity: 1;
}

/* ==========================================================================
   PAGE 1: Front Cover Design (หน้าปกหนังสือจริงในเล่ม)
   ========================================================================== */
.cover-page-layout {
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, #00182b 0%, #002b49 60%, #033e6b 100%);
  color: #ffffff;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  text-align: center;
  position: relative;
  border: 1px solid rgba(197, 160, 89, 0.4);
}

.cover-page-layout::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  bottom: 12px;
  border: 2px solid rgba(197, 160, 89, 0.35);
  border-radius: 6px;
  pointer-events: none;
}

.cover-page-layout::after {
  content: "";
  position: absolute;
  top: 16px;
  left: 16px;
  right: 16px;
  bottom: 16px;
  border: 1px dashed rgba(197, 160, 89, 0.25);
  border-radius: 4px;
  pointer-events: none;
}

.cover-tag-badge {
  background: linear-gradient(135deg, #c5a059, #dfba73);
  color: #002b49;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.35rem 1.25rem;
  border-radius: 30px;
  text-transform: uppercase;
  box-shadow: 0 4px 10px rgba(197, 160, 89, 0.35);
}

.cover-crest-box {
  margin: 1rem 0;
}

.cover-crest-box svg {
  width: 80px;
  height: 80px;
  filter: drop-shadow(0 4px 10px rgba(0,0,0,0.4));
}

.cover-main-title {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.35;
  color: #ffffff;
}

.cover-main-title span {
  color: var(--accent-gold);
  display: block;
  font-size: 1.85rem;
  margin-top: 0.25rem;
}

.cover-sub-title {
  font-size: 0.88rem;
  color: #e2e8f0;
  line-height: 1.5;
  margin-top: 0.75rem;
  max-width: 90%;
}

.cover-line-divider {
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
  margin: 0.75rem auto;
}

.cover-footer-meta {
  font-size: 0.78rem;
  color: #cbd5e0;
  line-height: 1.6;
}

.cover-footer-meta strong {
  color: #ffffff;
}

.cover-legend-strip {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.74rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 0.5rem;
}

/* ==========================================================================
   PAGE 2: Preface & Color Legend (คำชี้แจงคู่มือ)
   ========================================================================== */
.preface-page-layout {
  width: 100%;
  height: 100%;
  background: var(--paper-cream);
  color: #2d3748;
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 0.88rem;
  line-height: 1.65;
}

.preface-header {
  border-bottom: 2px solid var(--accent-gold);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.preface-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.preface-sub {
  font-size: 0.82rem;
  color: #718096;
}

.guide-box-green {
  background: #eafaf1;
  border-left: 4px solid #27ae60;
  border-radius: 0 8px 8px 0;
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  color: #196f3d;
  font-size: 0.84rem;
}

.example-box-yellow {
  background: #fef9e7;
  border-left: 4px solid #f39c12;
  border-radius: 0 8px 8px 0;
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  color: #935116;
  font-size: 0.84rem;
}

/* ==========================================================================
   PAGE 3 & 4: Table of Contents Inside Book (หน้าสารบัญในเล่ม)
   ========================================================================== */
.toc-page-layout {
  width: 100%;
  height: 100%;
  background: var(--paper-cream);
  color: #2d3748;
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
}

.toc-page-header {
  border-bottom: 2px solid var(--accent-gold);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toc-page-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.toc-page-tag {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  color: var(--accent-gold);
  font-weight: 600;
}

.toc-book-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}

.toc-book-row {
  display: flex;
  align-items: baseline;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 0.86rem;
  text-decoration: none;
  color: inherit;
}

.toc-book-row:hover {
  background: rgba(197, 160, 89, 0.15);
  color: var(--primary);
  transform: translateX(3px);
}

.toc-book-num {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--primary);
  min-width: 68px;
}

.toc-book-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 0;
  max-width: 250px;
}

.toc-book-dots {
  flex: 1;
  border-bottom: 1px dotted #a0aec0;
  margin: 0 0.5rem;
  height: 1px;
}

.toc-book-page {
  font-family: var(--font-heading);
  font-weight: 600;
  color: #4a5568;
  font-size: 0.82rem;
  white-space: nowrap;
}

/* Navigation Click Zones */
.nav-zone {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 20;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s;
}

.nav-zone:hover {
  opacity: 1;
  background: rgba(0,0,0,0.25);
}

.nav-zone.prev { left: 0; }
.nav-zone.next { right: 0; }

.nav-zone-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(0, 43, 73, 0.88);
  border: 1px solid var(--accent-gold);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: transform 0.2s;
}

.nav-zone:hover .nav-zone-icon {
  transform: scale(1.1);
  background: var(--accent-gold);
  color: #002b49;
}

/* ==========================================================================
   Bottom Navigation Toolbar & Deep Zoom Controls
   ========================================================================== */
.ebook-footer {
  height: 58px;
  background: var(--toolbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(197, 160, 89, 0.35);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  z-index: 100;
  box-shadow: 0 -4px 15px rgba(0,0,0,0.35);
}

.footer-nav-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-nav-page {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
}

.btn-nav-page:hover:not(:disabled) {
  background: var(--accent-gold);
  color: #002b49;
  border-color: var(--accent-gold);
}

.btn-nav-page:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.footer-center {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex: 1;
  max-width: 500px;
  justify-content: center;
}

.page-indicator-box {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: #e2e8f0;
  white-space: nowrap;
}

.page-input {
  width: 46px;
  padding: 0.25rem 0.3rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(197, 160, 89, 0.4);
  border-radius: 6px;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  outline: none;
}

.page-input:focus {
  border-color: var(--accent-gold);
}

.page-scrubber {
  flex: 1;
  max-width: 280px;
  height: 6px;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.page-scrubber::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-gold);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(0,0,0,0.4);
}

/* Expanded Zoom Controls */
.footer-zoom-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.zoom-badge {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-gold);
  min-width: 48px;
  text-align: center;
  background: rgba(0,0,0,0.25);
  padding: 0.25rem 0.4rem;
  border-radius: 4px;
}

/* Drawer & Sidebars */
.drawer-backdrop {
  position: fixed;
  top: 56px;
  bottom: 58px;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 80;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.drawer-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.side-drawer {
  position: fixed;
  top: 56px;
  bottom: 58px;
  left: 0;
  width: 380px;
  max-width: 90vw;
  background: #091522;
  color: #e2e8f0;
  border-right: 1px solid rgba(197, 160, 89, 0.3);
  box-shadow: 5px 0 25px rgba(0,0,0,0.5);
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 90;
  display: flex;
  flex-direction: column;
}

.side-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.drawer-close-btn {
  background: transparent;
  border: none;
  color: #a0aec0;
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  transition: color 0.2s;
}

.drawer-close-btn:hover {
  color: #ffffff;
  background: rgba(255,255,255,0.1);
}

.drawer-search-box {
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.drawer-search-input {
  width: 100%;
  padding: 0.55rem 0.75rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  color: #ffffff;
  font-family: var(--font-base);
  font-size: 0.88rem;
  outline: none;
}

.drawer-search-input:focus {
  border-color: var(--accent-gold);
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0.5rem;
}

.toc-chapter-group {
  margin-bottom: 0.75rem;
}

.toc-group-title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--accent-gold);
  padding: 0.4rem 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.toc-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.75rem;
  color: #cbd5e0;
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1.4;
}

.toc-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  padding-left: 0.95rem;
}

.toc-item.active {
  background: linear-gradient(90deg, rgba(197, 160, 89, 0.3), rgba(197, 160, 89, 0.05));
  border-left: 3px solid var(--accent-gold);
  color: #ffffff;
  font-weight: 500;
}

.toc-item-page {
  font-size: 0.76rem;
  background: rgba(255,255,255,0.1);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  color: #a0aec0;
  font-family: var(--font-heading);
}

.thumbnails-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  padding: 0.75rem;
}

.thumb-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  padding: 0.4rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: all 0.2s;
}

.thumb-card:hover, .thumb-card.active {
  border-color: var(--accent-gold);
  background: rgba(197, 160, 89, 0.15);
  transform: translateY(-2px);
}

.thumb-canvas-box {
  width: 100%;
  aspect-ratio: 1 / 1.414;
  background: #ffffff;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb-canvas-box canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumb-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: #cbd5e0;
  margin-top: 0.35rem;
}

.toast-notice {
  position: fixed;
  bottom: 75px;
  left: 50%;
  transform: translateX(-50%) translateY(30px);
  background: #002b49;
  border: 1px solid var(--accent-gold);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: 30px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  box-shadow: 0 8px 25px rgba(0,0,0,0.4);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(5px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #091522;
  border: 1px solid var(--accent-gold);
  border-radius: 14px;
  max-width: 540px;
  width: 100%;
  box-shadow: 0 15px 40px rgba(0,0,0,0.6);
  padding: 1.75rem;
  color: #ffffff;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.share-link-input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.share-url-input {
  flex: 1;
  padding: 0.6rem 0.8rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  color: #ffffff;
  font-family: monospace;
  font-size: 0.85rem;
  outline: none;
}

.share-url-input:focus {
  border-color: var(--accent-gold);
}

@media (max-width: 768px) {
  .brand-subtitle { display: none; }
  .tool-btn span { display: none; }
  .footer-center { max-width: none; }
  .page-scrubber { display: none; }
  .side-drawer { width: 320px; }
}