/* ==========================================================================
   TT-Neck Presentation Deck Stylesheet
   Design System: Startup 33% + Seongsu 33% + Big Tech 33%
   ========================================================================== */

:root[data-theme="dark"] {
    --bg-main: #0B0C10;
    --bg-card: rgba(24, 26, 33, 0.75);
    --bg-card-solid: #151720;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(204, 255, 0, 0.4);
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    
    --accent-neon: #CCFF00; /* Seongsu Neon Lime */
    --accent-orange: #FF5500; /* Seongsu Spark Orange */
    --accent-blue: #3B82F6; /* Big Tech Blue */
    --accent-startup: #10B981; /* Startup Green */
    
    --navbar-bg: rgba(11, 12, 16, 0.85);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

:root[data-theme="light"] {
    --bg-main: #F8F9FC;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-solid: #FFFFFF;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.2);
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-muted: #9CA3AF;
    
    --accent-neon: #84CC16; /* Adapted Lime for light mode */
    --accent-orange: #EA580C;
    --accent-blue: #2563EB;
    --accent-startup: #059669;
    
    --navbar-bg: rgba(248, 249, 252, 0.85);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* --------------------------------------------------------------------------
   Header & Navbar (Big Tech Style)
   -------------------------------------------------------------------------- */
.navbar {
    height: 60px;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--navbar-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-badge {
    background: var(--accent-neon);
    color: #000;
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    font-size: 14px;
    padding: 3px 8px;
    border-radius: 6px;
    letter-spacing: 0.5px;
}

.logo-text {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 12px;
    color: var(--text-muted);
    padding-left: 8px;
    border-left: 1px solid var(--border-color);
}

.slide-counter {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 1px;
    color: var(--text-secondary);
    background: var(--bg-card-solid);
    padding: 4px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.icon-btn {
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    border-color: var(--accent-neon);
    transform: translateY(-1px);
}

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* Progress Bar */
.progress-container {
    height: 3px;
    background: rgba(255, 255, 255, 0.05);
    width: 100%;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-neon), var(--accent-orange));
    width: 16.66%;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   Deck Container & Slide Transition
   -------------------------------------------------------------------------- */
.deck-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.98) translateY(12px);
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.4s;
    padding: 30px 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    transform: scale(1) translateY(0);
}

.slide-content {
    width: 100%;
    max-width: 1200px;
    height: 100%;
    max-height: 680px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Slide Header */
.slide-header {
    margin-bottom: 28px;
}

.section-tag {
    font-family: 'Outfit', sans-serif;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--accent-neon);
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 6px;
}

.slide-header h2 {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.25;
}

.slide-header p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* --------------------------------------------------------------------------
   Reusable Cards & Grids (Notion + Big Tech Glass)
   -------------------------------------------------------------------------- */
.grid-3-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.25s ease;
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
}

.card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.card-footer-tag {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-neon);
}

/* --------------------------------------------------------------------------
   SLIDE 1: Hero Custom
   -------------------------------------------------------------------------- */
.hero-slide {
    justify-content: space-between;
}

.hero-header {
    margin-bottom: 30px;
}

.tag-group {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.tag {
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
}

.tag-lime { background: var(--accent-neon); color: #000; }
.tag-startup { background: rgba(16, 185, 129, 0.15); color: #10B981; border: 1px solid rgba(16, 185, 129, 0.3); }
.tag-seongsu { background: rgba(255, 85, 0, 0.15); color: #FF5500; border: 1px solid rgba(255, 85, 0, 0.3); }
.tag-bigtech { background: rgba(59, 130, 246, 0.15); color: #3B82F6; border: 1px solid rgba(59, 130, 246, 0.3); }

.hero-title {
    font-size: 42px;
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -1px;
}

.highlight-text {
    background: linear-gradient(135deg, var(--accent-neon), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 17px;
    color: var(--text-secondary);
    margin-top: 16px;
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   SLIDE 2: Visual Mix & Palette
   -------------------------------------------------------------------------- */
.design-card {
    display: flex;
    flex-direction: column;
}

.badge-mix {
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 6px;
    align-self: flex-start;
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

.badge-startup { background: var(--accent-startup); color: #fff; }
.badge-seongsu { background: var(--accent-orange); color: #fff; }
.badge-bigtech { background: var(--accent-blue); color: #fff; }

.mix-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 12px;
}

.feature-item {
    display: flex;
    gap: 10px;
    font-size: 13px;
    line-height: 1.5;
}

.feature-item .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-neon);
    margin-top: 6px;
    flex-shrink: 0;
}

.palette-bar {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-card-solid);
    padding: 12px 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.palette-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
}

.color-chip {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   SLIDE 3: Topics
   -------------------------------------------------------------------------- */
.topic-card {
    display: flex;
    flex-direction: column;
}

.topic-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.topic-icon {
    font-size: 28px;
    background: var(--bg-main);
    padding: 10px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.topic-tag {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-neon);
    background: rgba(204, 255, 0, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
}

.topic-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.topic-list li {
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.5;
    padding-left: 14px;
    position: relative;
}

.topic-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-neon);
    font-weight: bold;
}

/* --------------------------------------------------------------------------
   SLIDE 4: Interactive Demo Widget
   -------------------------------------------------------------------------- */
.interactive-demo-wrapper {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
}

.demo-card {
    border: 2px solid var(--accent-neon);
}

.demo-badge {
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    font-weight: 800;
    color: #000;
    background: var(--accent-neon);
    display: inline-block;
    padding: 3px 10px;
    border-radius: 4px;
    margin-bottom: 16px;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
}

.option-btn {
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-btn:hover {
    border-color: var(--accent-neon);
    background: rgba(204, 255, 0, 0.05);
    transform: translateX(4px);
}

.demo-result-box {
    margin-top: 20px;
    padding: 16px;
    background: var(--bg-card-solid);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.hidden { display: none; }

.result-score-badge {
    display: inline-block;
    background: var(--accent-orange);
    color: #fff;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 13px;
    margin: 10px 0;
}

.mock-adsense {
    margin-top: 16px;
    border: 1.5px dashed var(--accent-neon);
    padding: 12px;
    border-radius: 10px;
    background: rgba(204, 255, 0, 0.03);
}

.ads-label {
    font-size: 10px;
    font-weight: 800;
    color: var(--accent-neon);
    display: block;
    margin-bottom: 4px;
}

.ads-content strong {
    font-size: 13px;
    color: var(--text-primary);
}

.ads-content p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.action-btn {
    margin-top: 14px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

.explanation-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.principle-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.step-num {
    background: var(--accent-neon);
    color: #000;
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   SLIDE 5: Monetization Mockup & Keywords
   -------------------------------------------------------------------------- */
.wireframe-mock {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px;
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mock-header {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
}

.mock-ad {
    font-size: 11px;
    font-weight: 700;
    padding: 8px 10px;
    border-radius: 6px;
    text-align: center;
}

.ad-top { background: rgba(204, 255, 0, 0.15); color: var(--accent-neon); border: 1px solid var(--accent-neon); }
.ad-inline { background: rgba(255, 85, 0, 0.15); color: var(--accent-orange); border: 1px solid var(--accent-orange); }
.ad-result { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); border: 1px solid var(--accent-blue); }
.ad-sticky { background: rgba(16, 185, 129, 0.15); color: var(--accent-startup); border: 1px solid var(--accent-startup); }

.mock-line {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    margin: 6px 0;
}

.keyword-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.kw-tag {
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 8px;
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.kw-high {
    border-color: var(--accent-neon);
    color: var(--text-primary);
    font-weight: 700;
}

.seo-spec-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 12px;
    font-size: 13.5px;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   SLIDE 6: Roadmap
   -------------------------------------------------------------------------- */
.roadmap-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.timeline-step {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 20px 16px;
    position: relative;
}

.step-badge {
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    font-weight: 800;
    background: var(--accent-neon);
    color: #000;
    padding: 2px 8px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 12px;
}

.timeline-step h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.timeline-step p {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.notice-box {
    background: rgba(255, 85, 0, 0.1);
    border: 1px solid var(--accent-orange);
    padding: 16px 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 14px;
}

.notice-icon { font-size: 24px; }
.notice-box strong { color: var(--accent-orange); }
.notice-box span { color: var(--text-primary); }

/* --------------------------------------------------------------------------
   Deck Controls (Footer)
   -------------------------------------------------------------------------- */
.deck-controls {
    height: 70px;
    padding: 0 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--navbar-bg);
    border-top: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    z-index: 100;
}

.nav-btn {
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    border-color: var(--accent-neon);
    transform: translateY(-1px);
}

.nav-btn-primary {
    background: var(--accent-neon);
    color: #000;
    border: none;
}

.nav-btn-primary:hover {
    background: #b8e600;
    color: #000;
}

.slide-dots {
    display: flex;
    gap: 8px;
}

.dot-btn {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
}

.dot-btn.active {
    background: var(--accent-neon);
    width: 24px;
    border-radius: 10px;
}

/* Responsive Scaling */
@media (max-width: 960px) {
    .grid-3-col, .grid-2-col, .grid-2x2, .roadmap-timeline, .interactive-demo-wrapper {
        grid-template-columns: 1fr;
    }
    .slide-content { max-height: none; overflow-y: auto; }
    .hero-title { font-size: 28px; }
}