:root {
    --night-ink: #05070C;
    --card-bg: #10141F;
    --card-edge: #1E2535;
    --blue: #2E5CFF;
    --blue-soft: #7FA2FF;
    --amber: #F7901F;
    --amber-soft: #FFA94D;
    --text: #F2F4F8;
    --text-soft: #8892A6;
}

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

html, body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--night-ink);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
}

body {
    scroll-behavior: auto;
}

/* Progress Bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--card-edge);
    z-index: 1000;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--blue), var(--blue-soft));
    width: 0%;
    transition: width 0.3s ease;
}

/* Navigation Buttons */
.nav-btn {
    position: fixed;
    bottom: 30px;
    background: var(--card-bg);
    border: 2px solid var(--card-edge);
    color: var(--text);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: var(--blue);
    border-color: var(--blue);
    transform: scale(1.1);
}

.prev-btn {
    left: 30px;
}

.next-btn {
    left: 100px;
}

.search-toggle,
.edit-toggle {
    position: fixed;
    bottom: 30px;
    background: var(--card-bg);
    border: 1px solid var(--card-edge);
    color: var(--text);
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    z-index: 1000;
    font-size: 1rem;
}

.search-toggle {
    right: 30px;
}

.edit-toggle {
    right: 90px;
}

/* Slides */
.slide {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 60px 40px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    overflow-y: auto;
    overflow-x: hidden;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 1;
}

/* Slide Videos */
.slide-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.bg-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scrim {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(5,7,12,0.9) 0%, rgba(16,20,31,0.7) 100%);
}

.slide-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1000px;
}

/* Titles */
.slide-title {
    font-size: 2.5rem;
    margin-bottom: 40px;
    color: var(--blue-soft);
    font-weight: 600;
    text-align: center;
}

.title-slide {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.title-slide .kicker {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    color: var(--blue);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.title-slide .kicker::after {
    content: '●';
    color: var(--amber);
    margin-left: 8px;
    animation: pulse 2s infinite;
}

.title-slide em {
    font-family: 'Montserrat', sans-serif;
    font-style: italic;
    color: var(--blue-soft);
    display: block;
    margin-top: 10px;
}

/* Kicker */
.kicker {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: var(--blue);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Blocks */
.blocks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    width: 100%;
    max-width: 1100px;
    margin-top: 20px;
}

.block-card {
    background: var(--card-bg);
    border: 1px solid var(--card-edge);
    border-radius: 12px;
    padding: 24px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.block-card:hover {
    transform: translateY(-4px);
    border-color: var(--blue);
}

.block-num {
    display: inline-block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--blue-soft);
}

.block-num.luna { color: var(--blue-soft); }
.block-num.terra { color: var(--amber-soft); }
.block-num.sol { color: var(--blue); }

.stage-num {
    display: inline-block;
    font-size: 1.5rem;
    margin-right: 12px;
}

/* Two Column */
.two-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    width: 100%;
    max-width: 1000px;
    margin-top: 20px;
}

.col-card {
    background: var(--card-bg);
    border: 1px solid var(--card-edge);
    border-radius: 12px;
    padding: 24px;
}

.col-card.ki { border-left: 4px solid var(--blue); }
.col-card.mensch { border-left: 4px solid var(--amber); }

/* Stage Row */
.stage-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    width: 100%;
    max-width: 1000px;
    margin-top: 20px;
}

.stage {
    background: var(--card-bg);
    border: 1px solid var(--card-edge);
    border-radius: 12px;
    padding: 24px;
    min-width: 180px;
    text-align: center;
}

.stage .stage-num {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--blue);
    display: block;
    margin-bottom: 8px;
}

/* Rules */
.rules {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 800px;
    margin-top: 30px;
}

.rule {
    background: var(--card-bg);
    border-left: 4px solid var(--amber);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    color: var(--text-soft);
}

/* Demo Steps */
.demo-steps {
    list-style: none;
    margin-top: 16px;
}

.demo-steps li {
    padding: 8px 0;
    border-bottom: 1px solid var(--card-edge);
    color: var(--text-soft);
}

.demo-steps li:last-child {
    border-bottom: none;
}

/* Note */
.note {
    background: rgba(247, 144, 31, 0.1);
    border-left: 4px solid var(--amber);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin-top: 30px;
    color: var(--amber-soft);
    font-style: italic;
}

blockquote {
    font-family: 'Instrument Serif', serif;
    font-style: italic;
    color: var(--blue-soft);
    font-size: 1.25rem;
    margin-top: 24px;
}

/* Hint */
.hint {
    color: var(--text-soft);
    font-size: 0.875rem;
    margin-top: 20px;
}

/* RTK Line */
.rtk-line {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--card-edge);
    color: var(--text-soft);
    font-size: 0.875rem;
    text-align: center;
}

/* Agenda Slide */
.agenda-slide .block-card {
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.agenda-text {
    font-size: 1.5rem;
    line-height: 1.6;
}

/* Content Video */
.content-video {
    width: 100%;
    max-width: 800px;
    margin-top: 20px;
    border-radius: 12px;
}

/* Prompt Card */
.prompt-card {
    background: var(--card-bg);
    border: 1px solid var(--card-edge);
    border-radius: 12px;
    padding: 20px;
    margin-top: 16px;
}

.prompt-card header {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--blue);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.prompt-card pre {
    background: var(--night-ink);
    padding: 16px;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
    color: var(--text-soft);
}

.copy-btn {
    background: var(--blue);
    border: none;
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 12px;
    font-size: 0.875rem;
}

.copy-btn:hover {
    background: var(--blue-soft);
}

.highlight {
    border: 2px solid var(--amber);
}

/* Statement Slide */
.statement-slide {
    text-align: center;
}

.statement-slide h2 {
    font-size: 3rem;
    line-height: 1.3;
    max-width: 900px;
}

/* Code Sample */
.code-sample pre {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
    margin-top: 20px;
    max-width: 800px;
}

/* Slide Visibility */
[data-frag] {
    opacity: 0.3;
    transition: opacity 0.3s ease;
}

[data-frag].visible {
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .slide-title { font-size: 2rem; }
    .title-slide { font-size: 2.5rem; }
    .blocks { grid-template-columns: 1fr; }
    .two-col { grid-template-columns: 1fr; }
    .stage-row { flex-direction: column; }
    .stage { width: 100%; }
    .nav-btn { width: 45px; height: 45px; font-size: 1.25rem; }
    .prev-btn { left: 10px; }
    .next-btn { left: 65px; }
    .search-toggle { right: 10px; }
    .edit-toggle { right: 65px; }
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Search Modal */
.search-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5,7,12,0.95);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

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

.search-modal input {
    width: 80%;
    max-width: 600px;
    padding: 16px 20px;
    font-size: 1.25rem;
    border: 2px solid var(--blue);
    border-radius: 12px;
    background: var(--card-bg);
    color: var(--text);
}

.search-results {
    margin-top: 20px;
    max-height: 60vh;
    overflow-y: auto;
}

.search-result-item {
    padding: 16px;
    background: var(--card-bg);
    border: 1px solid var(--card-edge);
    border-radius: 8px;
    margin-top: 12px;
    cursor: pointer;
}

.search-result-item:hover {
    border-color: var(--blue);
}