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

:root {
    --slate-950: #0F172A;
    --slate-900: #1E293B;
    --slate-800: #334155;
    --slate-700: #475569;
    --slate-400: #94A3B8;
    --slate-100: #F1F5F9;
    --slate-50: #F8FAFC;
    --amber: #F59E0B;
    --amber-dark: #D97706;
    --sky: #38BDF8;
    --sky-dark: #0284C7;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--slate-950);
    color: var(--slate-50);
    line-height: 1.6;
    font-feature-settings: 'tnum' 1;
}

/* Navigation */
.slide-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-800);
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--amber);
    letter-spacing: -0.02em;
}

.nav-progress {
    color: var(--slate-400);
    font-size: 0.875rem;
}

.current-slide {
    color: var(--slate-50);
    font-weight: 600;
}

.nav-controls {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    color: var(--slate-50);
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.nav-btn:hover:not(:disabled) {
    background: var(--slate-700);
    border-color: var(--slate-600);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Slides Container */
.slides-container {
    padding-top: 5rem;
}

.slide {
    min-height: calc(100vh - 5rem);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
}

.slide.active {
    display: flex;
}

.slide-content {
    max-width: 1200px;
    width: 100%;
}

/* Barograph Trace */
.barograph-trace {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 120px;
    opacity: 0.15;
    background-image: 
        repeating-linear-gradient(90deg, var(--slate-700) 0px, var(--slate-700) 1px, transparent 1px, transparent 60px);
    overflow: hidden;
}

.barograph-trace::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--amber) 10%,
        var(--sky) 25%,
        var(--amber) 40%,
        var(--sky) 60%,
        var(--amber) 75%,
        transparent 100%
    );
    transform: translateY(-50%);
}

/* Cover Slide */
.cover {
    position: relative;
    text-align: center;
    padding: 6rem 2rem;
}

.cover-title {
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    margin-bottom: 1rem;
    color: var(--slate-50);
}

.cover-subtitle {
    font-size: 1.5rem;
    color: var(--slate-400);
    margin-bottom: 3rem;
}

.cover-meta {
    display: flex;
    gap: 2rem;
    justify-content: center;
    color: var(--slate-400);
    font-size: 0.875rem;
}

.cover-meta span {
    padding: 0.5rem 1rem;
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    border-radius: 6px;
}

/* Typography */
.slide-heading {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 2.5rem;
    letter-spacing: -0.03em;
}

/* Problem Slide */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.problem-card {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    padding: 2rem;
    border-radius: 12px;
}

.problem-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--amber);
    margin-bottom: 1rem;
}

.problem-card p {
    color: var(--slate-400);
    font-size: 1rem;
}

.insight-box {
    background: var(--slate-900);
    border-left: 3px solid var(--sky);
    padding: 1.5rem;
    border-radius: 8px;
}

/* Solution Slide */
.solution-statement {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    padding: 2.5rem;
    border-radius: 12px;
    margin-bottom: 2.5rem;
}

.solution-lead {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--slate-50);
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.feature {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    padding: 1.5rem;
    border-radius: 12px;
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature p {
    font-size: 0.875rem;
    color: var(--slate-400);
}

/* Journey Flow */
.journey-flow {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 1rem;
    align-items: center;
}

.journey-step {
    grid-column: span 2;
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    padding: 1.5rem;
    border-radius: 12px;
}

.journey-arrow {
    grid-column: span 1;
    text-align: center;
    font-size: 1.5rem;
    color: var(--slate-700);
}

.journey-number {
    width: 2rem;
    height: 2rem;
    background: var(--amber);
    color: var(--slate-950);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-bottom: 1rem;
}

.journey-step h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.journey-step p {
    font-size: 0.875rem;
    color: var(--slate-400);
    line-height: 1.5;
}

/* Watch Interface */
.interface-slide {
    max-width: 1400px;
}

.watch-prototypes {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.watch-frame {
    text-align: center;
}

.watch-screen {
    width: 198px;
    height: 242px;
    background: #000;
    border-radius: 42px;
    border: 8px solid #2d2d2d;
    padding: 1rem 0.75rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.watch-time {
    font-size: 0.625rem;
    color: var(--slate-400);
    margin-bottom: 0.25rem;
}

.watch-app-name {
    font-size: 0.625rem;
    color: var(--amber);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.attention-level {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.level-indicator {
    font-size: 2rem;
    line-height: 1;
}

.level-indicator.amber {
    color: var(--amber);
}

.level-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--slate-50);
}

.level-label {
    font-size: 0.625rem;
    color: var(--slate-400);
    margin-bottom: 1rem;
}

.barograph-mini {
    width: 140px;
    height: 40px;
    background-image: 
        repeating-linear-gradient(90deg, rgba(148, 163, 184, 0.1) 0px, rgba(148, 163, 184, 0.1) 1px, transparent 1px, transparent 20px);
    position: relative;
    margin-bottom: 1rem;
}

.barograph-mini::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--sky) 0%, var(--amber) 50%, var(--sky) 100%);
    transform: translateY(-50%);
}

.forecast-text {
    font-size: 0.75rem;
    color: var(--slate-50);
    text-align: center;
    line-height: 1.4;
    margin-bottom: 1rem;
}

.watch-button {
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    color: var(--slate-50);
    padding: 0.5rem 0.75rem;
    border-radius: 20px;
    font-size: 0.625rem;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    margin-top: auto;
}

.watch-button.primary {
    background: var(--amber);
    border-color: var(--amber);
    color: var(--slate-950);
}

.watch-button.secondary {
    background: transparent;
    font-size: 0.625rem;
}

/* Check-in Screen */
.checkin-screen {
    justify-content: space-between;
}

.rating-scale {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.rating-option {
    width: 2rem;
    height: 2rem;
    border: 1px solid var(--slate-700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--slate-400);
}

.rating-option.active {
    border-color: var(--amber);
    background: var(--amber);
    color: var(--slate-950);
    font-weight: 600;
}

.rating-labels {
    display: flex;
    justify-content: space-between;
    width: 100%;
    font-size: 0.5rem;
    color: var(--slate-400);
    margin-bottom: 1.5rem;
}

.symptoms-label {
    font-size: 0.625rem;
    color: var(--slate-50);
    margin-bottom: 0.5rem;
    align-self: flex-start;
}

.symptoms-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    width: 100%;
    margin-bottom: 1rem;
}

.symptom-chip {
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    color: var(--slate-400);
    padding: 0.5rem;
    border-radius: 12px;
    font-size: 0.625rem;
    font-family: inherit;
    cursor: pointer;
}

.symptom-chip.active {
    border-color: var(--amber);
    background: rgba(245, 158, 11, 0.15);
    color: var(--amber);
}

/* Alert Screen */
.alert-screen {
    justify-content: center;
    gap: 1rem;
}

.alert-icon {
    font-size: 2.5rem;
}

.alert-message {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--slate-50);
    text-align: center;
    line-height: 1.4;
}

.alert-context {
    font-size: 0.625rem;
    color: var(--slate-400);
    text-align: center;
    line-height: 1.5;
}

.alert-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
}

.watch-caption {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--slate-400);
}

/* Phone Interface */
.phone-prototype {
    display: flex;
    justify-content: center;
}

.phone-frame {
    width: 375px;
}

.phone-screen {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    border-radius: 24px;
    padding: 2rem 1.5rem;
}

.phone-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.analytics-summary {
    margin-bottom: 2rem;
}

.summary-card {
    background: var(--slate-800);
    padding: 1rem;
    border-radius: 12px;
}

.summary-label {
    font-size: 0.875rem;
    color: var(--slate-400);
    margin-bottom: 0.25rem;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--slate-50);
}

.correlations h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.correlation-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

.correlation-bar {
    height: 6px;
    background: var(--amber);
    border-radius: 3px;
}

.correlation-item span {
    font-size: 0.875rem;
    color: var(--slate-400);
}

.correlation-item strong {
    font-size: 0.875rem;
    color: var(--slate-50);
    font-weight: 600;
}

.chart-container {
    margin: 2rem 0;
}

.timeline-chart {
    width: 100%;
    height: 80px;
}

.chart-legend {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--slate-400);
}

.legend-line {
    display: inline-block;
    width: 20px;
    height: 2px;
    margin-right: 0.25rem;
    vertical-align: middle;
}

.legend-line.pressure {
    background: var(--slate-400);
}

.legend-line.symptoms {
    background: var(--amber);
}

.phone-button {
    width: 100%;
    background: var(--amber);
    border: none;
    color: var(--slate-950);
    padding: 0.875rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1.5rem;
}

/* Competition Table */
.competition-table {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.comp-row {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    border-bottom: 1px solid var(--slate-800);
}

.comp-row:last-child {
    border-bottom: none;
}

.comp-row.header {
    background: var(--slate-800);
}

.comp-cell {
    padding: 1rem;
    font-size: 0.875rem;
    border-right: 1px solid var(--slate-800);
}

.comp-cell:last-child {
    border-right: none;
}

.comp-cell.label {
    font-weight: 600;
    color: var(--slate-50);
}

.comp-cell.highlight {
    background: rgba(245, 158, 11, 0.1);
    font-weight: 600;
    color: var(--amber);
}

.comp-row.header .comp-cell {
    font-weight: 600;
    color: var(--slate-50);
}

.competitive-edge {
    background: var(--slate-900);
    border-left: 3px solid var(--sky);
    padding: 1.5rem;
    border-radius: 8px;
}

/* Roadmap */
.roadmap {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.roadmap-phase {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    border-radius: 12px;
    padding: 1.5rem;
}

.phase-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.phase-number {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--amber);
    color: var(--slate-950);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.phase-info {
    flex: 1;
}

.phase-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.phase-duration {
    font-size: 0.875rem;
    color: var(--amber);
    font-weight: 500;
}

.phase-tasks {
    list-style: none;
    padding-left: 3.5rem;
}

.phase-tasks li {
    font-size: 0.875rem;
    color: var(--slate-400);
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.phase-tasks li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--slate-700);
}

.roadmap-total {
    background: var(--slate-900);
    border: 2px solid var(--amber);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    font-size: 1.125rem;
}

/* Risks Grid */
.risks-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.risk-card {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    padding: 2rem;
    border-radius: 12px;
}

.risk-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.risk-card ul {
    list-style: none;
}

.risk-card li {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--slate-400);
    position: relative;
}

.risk-card.positive li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--sky);
}

.risk-card.negative li::before {
    content: '⚠';
    position: absolute;
    left: 0;
    color: var(--amber);
}

.ethics-box {
    background: var(--slate-900);
    border-left: 3px solid var(--amber);
    padding: 2rem;
    border-radius: 8px;
}

.ethics-box h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.ethics-box ul {
    list-style: none;
}

.ethics-box li {
    margin-bottom: 0.75rem;
    color: var(--slate-400);
}

.ethics-box strong {
    color: var(--slate-50);
}

/* Names Grid */
.names-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.name-card {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
}

.name-card.recommended {
    border: 2px solid var(--amber);
}

.name-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--slate-50);
}

.name-meaning {
    font-size: 0.875rem;
    color: var(--slate-400);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.domain-badge {
    display: inline-block;
    background: var(--slate-800);
    color: var(--sky);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: 'Courier New', monospace;
    margin-bottom: 0.5rem;
}

.name-verdict {
    display: block;
    color: var(--amber);
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

/* Decision Section */
.decision-section {
    background: var(--slate-900);
    border: 1px solid var(--slate-800);
    padding: 2rem;
    border-radius: 12px;
}

.decision-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.decision-checklist {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.decision-checklist label {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1rem;
    color: var(--slate-400);
    cursor: pointer;
}

.decision-checklist input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
    accent-color: var(--amber);
}

/* Responsive */
@media (max-width: 1024px) {
    .journey-flow {
        grid-template-columns: 1fr;
    }
    
    .journey-step {
        grid-column: span 1;
    }
    
    .journey-arrow {
        grid-column: span 1;
        transform: rotate(90deg);
    }
    
    .problem-grid,
    .solution-features,
    .risks-grid,
    .names-grid {
        grid-template-columns: 1fr;
    }
    
    .comp-row {
        grid-template-columns: 1fr;
    }
    
    .watch-prototypes {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0.75rem 1rem;
        gap: 0.75rem;
    }
    
    .nav-brand {
        font-size: 1rem;
    }
    
    .nav-progress {
        font-size: 0.75rem;
    }
    
    .nav-controls {
        gap: 0.25rem;
    }
    
    .nav-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
        min-width: 36px;
    }
    
    .cover-title {
        font-size: 2.5rem;
    }
    
    .cover-subtitle {
        font-size: 1.125rem;
    }
    
    .cover-meta {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .slide-heading {
        font-size: 1.75rem;
    }
}