/* ==========================================================================
   Presentation System Styles
   Sleek, high-fidelity slide deck for presentations and live streams.
   Adapts to global design tokens.
   ========================================================================== */

:root {
  --slide-gap: 2rem;
  --hud-height: 70px;
  --hud-bg: rgba(12, 12, 13, 0.85);
  --hud-border: rgba(39, 39, 42, 0.6);
  --hud-fg: #ffffff;
  --kbd-bg: #212124;
  --kbd-fg: #a1a1aa;
}

html.light-mode {
  --hud-bg: rgba(242, 240, 234, 0.85);
  --hud-border: rgba(201, 197, 191, 0.6);
  --hud-fg: #141413;
  --kbd-bg: #e7e5e4;
  --kbd-fg: #6b6a65;
}

/* Base Body Setup */
.presentation-body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* Background Atmosphere */
.tech-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.15) 50%),
    linear-gradient(90deg, rgba(255, 0, 0, 0.02), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.02));
  background-size: 100% 4px, 6px 100%;
  z-index: 100;
  pointer-events: none;
  opacity: 0.4;
}

html.light-mode .tech-overlay {
  opacity: 0.15;
}

/* Grid overlay behind slides */
.presentation-viewport {
  flex: 1;
  width: 100%;
  height: calc(100vh - var(--hud-height));
  position: relative;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
  background-color: var(--bg);
  overflow: hidden;
}

/* Ambient glow orbs */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.12;
  z-index: 0;
  pointer-events: none;
  mix-blend-mode: screen;
}

html.light-mode .glow-orb {
  opacity: 0.05;
  mix-blend-mode: multiply;
}

.orb-1 {
  width: 50vw;
  height: 50vw;
  top: -10vw;
  right: -10vw;
  background: var(--accent-primary);
}

.orb-2 {
  width: 40vw;
  height: 40vw;
  bottom: -5vw;
  left: -5vw;
  background: var(--accent-secondary);
}

/* Slide Containers */
.slide-deck {
  width: 100%;
  height: 100%;
  position: relative;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 3rem 4rem calc(3rem + var(--hud-height)) 4rem;
  box-sizing: border-box;
  opacity: 0;
  visibility: hidden;
  transform: translateX(30px);
  transition: opacity 0.5s ease, transform 0.5s ease, visibility 0.5s;
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 1;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  z-index: 2;
}

.slide.previous-slide {
  transform: translateX(-30px);
}

/* Inner Layout & Typography */
.slide-layout-center {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.slide-layout-split {
  max-width: 1300px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
  height: 100%;
}

@media (max-width: 1024px) {
  .slide-layout-split {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2rem;
  }
}

.slide-header {
  margin-bottom: 2rem;
  width: 100%;
}

.slide-layout-center .slide-header {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.slide-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

.slide-eyebrow .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  box-shadow: 0 0 8px var(--accent-primary);
  display: inline-block;
}

.slide h2 {
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 1rem 0;
  letter-spacing: var(--tracking-tight);
}

.slide-subtitle {
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  color: var(--muted);
  max-width: 800px;
  margin: 0;
  line-height: 1.5;
}

.slide-body {
  width: 100%;
}

/* Premium Graphics, Cards & Windows */
.slide-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.slide-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-accent-elevated);
}

.slide-card h3 {
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.slide-card p {
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
  font-size: 1.05rem;
}

/* Grid comparison lists */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  width: 100%;
}

/* Terminal Styles */
.slide-terminal {
  background-color: var(--terminal);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  width: 100%;
  overflow: hidden;
  text-align: left;
}

.terminal-header {
  background-color: color-mix(in oklch, var(--terminal) 90%, #ffffff 5%);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background-color: #ff5f56; }
.terminal-dot.yellow { background-color: #ffbd2e; }
.terminal-dot.green { background-color: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.terminal-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.6;
  color: #f4f4f5;
  overflow-x: auto;
}

.term-prompt {
  color: var(--accent-primary);
  margin-right: 0.5rem;
}

.term-cmd {
  color: #ffffff;
  font-weight: 500;
}

.term-comment {
  color: #71717a;
  display: block;
  margin-bottom: 0.5rem;
}

.term-out {
  color: #a1a1aa;
  display: block;
  margin-top: 0.5rem;
  white-space: pre-wrap;
}

.term-out-success {
  color: #4ade80;
}

.term-out-highlight {
  color: var(--accent-secondary);
}

/* Custom Visual Elements & Badges */
.concept-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  background: color-mix(in oklch, var(--accent-primary) 10%, transparent);
  border: 1px solid color-mix(in oklch, var(--accent-primary) 30%, transparent);
  color: var(--accent-primary);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.concept-tag.blue {
  background: color-mix(in oklch, var(--accent-secondary) 10%, transparent);
  border: 1px solid color-mix(in oklch, var(--accent-secondary) 30%, transparent);
  color: var(--accent-secondary);
}

/* Comparison Matrix Table */
.comparison-table-wrapper {
  overflow-x: auto;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 1rem;
}

.comparison-table th, 
.comparison-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.comparison-table th {
  background: color-mix(in oklch, var(--surface-1) 80%, var(--bg));
  font-weight: 600;
  color: var(--fg);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table td strong {
  color: var(--accent-primary);
}

/* HUD Presentation Controls styling */
.presentation-controls {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 3rem);
  max-width: 1100px;
  height: var(--hud-height);
  background-color: var(--hud-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--hud-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  box-sizing: border-box;
  z-index: 1000;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  transition: opacity 0.3s ease;
}

.controls-left, .controls-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 30%;
}

.controls-right {
  justify-content: flex-end;
}

.controls-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  width: 40%;
}

.ctrl-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--hud-fg);
  border-radius: 8px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ctrl-btn:hover {
  background: color-mix(in oklch, var(--hud-fg) 8%, transparent);
  border-color: color-mix(in oklch, var(--hud-fg) 15%, transparent);
}

.back-btn {
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0 0.75rem;
  gap: 0.5rem;
}

.nav-btn {
  width: 44px;
  border-radius: 50%;
}

.util-btn {
  width: 40px;
}

.presentation-title-hud {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-left: 1px solid var(--hud-border);
  padding-left: 0.75rem;
}

.hud-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #27c93f;
  box-shadow: 0 0 8px #27c93f;
  animation: pulse-hud 2s infinite alternate;
}

@keyframes pulse-hud {
  0% { opacity: 0.4; }
  100% { opacity: 1; }
}

.hud-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--hud-fg);
  opacity: 0.8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.slide-indicator {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  min-width: 60px;
  justify-content: center;
}

.indicator-divider {
  opacity: 0.4;
  font-weight: 400;
}

/* Progress bar inside HUD */
.presentation-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: color-mix(in oklch, var(--hud-fg) 5%, transparent);
  border-radius: 0 0 12px 12px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  transition: width 0.3s cubic-bezier(0.1, 0.8, 0.2, 1);
}

/* Modal Shortcut Help */
.presentation-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.presentation-modal.modal-active {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: calc(100% - 2rem);
  max-width: 500px;
  position: relative;
  z-index: 10;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1.2rem;
}

.modal-close:hover {
  color: var(--fg);
}

.modal-body {
  padding: 1.5rem;
}

.shortcut-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.shortcut-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px dashed var(--soft-border);
  padding-bottom: 0.75rem;
}

.shortcut-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.shortcut-item kbd {
  background: var(--kbd-bg);
  color: var(--kbd-fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  box-shadow: 0 2px 0 var(--border);
  margin-right: 0.25rem;
}

.shortcut-item span {
  font-size: 0.95rem;
  color: var(--muted);
}

/* Cover Slide styling */
.cover-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  justify-content: center;
  height: 100%;
  max-width: 1000px;
  margin: 0 auto;
}

.cover-badge {
  font-family: var(--font-mono);
  color: var(--accent-primary);
  background: color-mix(in oklch, var(--accent-primary) 8%, transparent);
  border: 1px solid color-mix(in oklch, var(--accent-primary) 20%, transparent);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.cover-badge .pulse-green {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 8px var(--accent-primary);
}

.cover-title {
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  margin: 0 0 1.5rem 0;
  letter-spacing: var(--tracking-tight);
}

.cover-title span {
  color: var(--accent-primary);
}

.cover-desc {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: var(--muted);
  max-width: 750px;
  line-height: 1.5;
  margin: 0 0 3rem 0;
}

.cover-footer {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.9rem;
  display: flex;
  gap: 2rem;
}

.cover-footer span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Presentation helper styling */
.tech-graphic-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

/* Theme adaptation for SVG diagrams */
svg.technical-diagram {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  max-width: 100%;
  height: auto;
}

svg.technical-diagram text {
  fill: var(--fg);
  font-family: var(--font-mono);
}

svg.technical-diagram text.dim {
  fill: var(--muted);
}

svg.technical-diagram text.accent {
  fill: var(--accent-primary);
}

svg.technical-diagram .box {
  fill: var(--surface);
  stroke: var(--border);
  stroke-width: 1.5px;
}

svg.technical-diagram .box.accent {
  stroke: var(--accent-primary);
  fill: color-mix(in oklch, var(--accent-primary) 5%, var(--surface));
}

svg.technical-diagram .box.secondary {
  stroke: var(--accent-secondary);
  fill: color-mix(in oklch, var(--accent-secondary) 5%, var(--surface));
}

svg.technical-diagram .arrow-line {
  stroke: var(--border);
  stroke-width: 2px;
  fill: none;
}

svg.technical-diagram .arrow-line.flowing {
  stroke-dasharray: 6 4;
  animation: svg-flow 30s linear infinite;
}

svg.technical-diagram .arrow-line.accent {
  stroke: var(--accent-primary);
}

svg.technical-diagram .arrow-line.secondary {
  stroke: var(--accent-secondary);
}

@keyframes svg-flow {
  to {
    stroke-dashoffset: -1000;
  }
}