/* ==========================================================================
   챌린지클럽 (CHALLENGE CLUB) - 파이트클럽 & 기사들의 도전장 Design System
   
   Aesthetic Theme:
   - Movie "Fight Club" vibes: Raw Coal Black (#0D0F12), Dark Charcoal (#161920)
   - Knights' Battle & Challenge Scroll: Deep Crimson (#DC2626 / #EF4444), Brass/Gold (#EAB308)
   - High Contrast & Sharp Typography: 'Outfit' (Headers) & 'Pretendard' (Body)
   ========================================================================== */

:root {
    /* Backgrounds */
    --color-bg-dark: #0D0F12;
    --color-bg-card: #161920;
    --color-bg-card-hover: #1F2430;
    --color-bg-input: #0D0F12;
    --color-border: #2D3446;
    --color-border-hover: #475569;

    /* Text Colors */
    --color-text-main: #F8FAFC;
    --color-text-sub: #94A3B8;
    --color-text-muted: #64748B;

    /* Fight Club & Challenge Accent Colors */
    --color-crimson: #EF4444;
    --color-crimson-dark: #7F1D1D;
    --color-lime: #DFFF45;
    --color-gold: #EAB308;
    --color-blue: #38BDF8;

    /* Typography */
    --font-primary: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Outfit', 'Pretendard', sans-serif;

    /* Radius & Spacing */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
}

/* Reset & Base Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-primary);
    background-color: var(--color-bg-dark);
    color: var(--color-text-main);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.65;
    letter-spacing: -0.015em;
}

/* Top Navigation Bar */
.top-bar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 64px;
    background: rgba(13, 15, 18, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.logo-icon {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 20px;
}

.logo-icon .bar {
    width: 5px;
    background: var(--color-crimson);
    border-radius: 2px;
}

.logo-icon .bar-1 { height: 10px; }
.logo-icon .bar-2 { height: 20px; }
.logo-icon .bar-3 { height: 14px; }

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--color-text-main);
    letter-spacing: -0.5px;
}

.brand-en {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--color-crimson);
    margin-left: 4px;
}

.slide-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--color-crimson);
    background: rgba(239, 68, 68, 0.08);
    padding: 4px 16px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.slide-title-pill {
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-sub);
    border-left: 1px solid var(--color-border);
    padding-left: 10px;
}

.controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Button Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.btn:active { transform: scale(0.98); }

.btn-icon {
    width: 40px; height: 40px; padding: 0; border-radius: 50%;
    background: var(--color-bg-card); color: var(--color-text-main); border: 1px solid var(--color-border);
}

.btn-icon:hover { background: var(--color-bg-card-hover); border-color: var(--color-border-hover); }

.btn-primary { background: var(--color-crimson); color: white; font-weight: 800; }
.btn-primary:hover { background: #dc2626; }

.btn-demo { background: var(--color-gold); color: #000; font-weight: 800; }
.btn-demo:hover { filter: brightness(1.1); }

.btn-outline { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-main); }
.btn-outline:hover { background: var(--color-bg-card); border-color: var(--color-border-hover); }

.btn-accent { background: var(--color-crimson); color: white; font-weight: 800; }
.btn-accent:disabled { background: var(--color-border); color: var(--color-text-muted); cursor: not-allowed; }

.btn-xl { padding: 12px 24px; font-size: 1rem; border-radius: var(--radius-md); }
.btn-lg { padding: 10px 20px; font-size: 0.95rem; }

/* Progress Bar */
.progress-container {
    position: fixed; top: 64px; left: 0; right: 0; height: 3px;
    background: rgba(255, 255, 255, 0.05); z-index: 99;
}

.progress-bar { height: 100%; width: 12.5%; background: var(--color-crimson); transition: width 0.25s ease; }

/* Deck & Slides Layout */
.deck-container { position: absolute; top: 67px; bottom: 0; left: 0; right: 0; overflow: hidden; }

.slide {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease;
    display: flex; align-items: center; justify-content: center; padding: 24px 36px;
}

.slide.active { opacity: 1; visibility: visible; }

.slide-content {
    width: 100%; max-width: 980px; max-height: calc(100vh - 100px);
    overflow-y: auto; background: var(--color-bg-card); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: 36px 44px; box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
    scrollbar-width: thin; scrollbar-color: var(--color-border) transparent;
}

/* Typography Hierarchy */
.slide-header {
    display: flex; align-items: center; gap: 14px; margin-bottom: 20px;
    border-bottom: 1px solid var(--color-border); padding-bottom: 14px;
}

.page-num {
    font-family: var(--font-heading); font-size: 1.1rem; font-weight: 900;
    color: var(--color-crimson); background: rgba(239, 68, 68, 0.1);
    padding: 2px 10px; border-radius: var(--radius-sm); border: 1px solid rgba(239, 68, 68, 0.3);
}

.slide-title { font-family: var(--font-heading); font-size: clamp(1.4rem, 2.5vw, 1.8rem); font-weight: 800; letter-spacing: -0.02em; }
.main-copy { font-size: clamp(1.3rem, 2.8vw, 1.65rem); font-weight: 800; line-height: 1.4; color: var(--color-text-main); letter-spacing: -0.02em; }
.text-highlight { color: var(--color-crimson); }
.text-crimson { color: var(--color-crimson); }
.text-gold { color: var(--color-gold); }
.sub-desc { font-size: 1.05rem; color: var(--color-text-sub); margin-top: 8px; line-height: 1.6; }

.margin-top-xs { margin-top: 10px; }
.margin-top-sm { margin-top: 16px; }
.margin-top-md { margin-top: 24px; }
.margin-bottom-sm { margin-bottom: 14px; }

/* Slide 1: Hero */
.hero-slide {
    text-align: center; display: flex; flex-direction: column;
    align-items: center; justify-content: center; padding: 40px 24px;
}

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(239, 68, 68, 0.12); color: var(--color-crimson);
    border: 1px solid rgba(239, 68, 68, 0.3); padding: 6px 16px; border-radius: var(--radius-full);
    font-size: 0.88rem; font-weight: 700; margin-bottom: 20px;
}

.hero-title { font-family: var(--font-heading); font-size: clamp(3rem, 6vw, 4.2rem); font-weight: 900; letter-spacing: -0.03em; margin-bottom: 6px; }
.brand-accent { color: var(--color-crimson); }
.hero-slogan { font-size: clamp(1.3rem, 2.5vw, 1.8rem); font-weight: 800; color: var(--color-text-main); margin-bottom: 20px; }

.hero-definition-box { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 16px 24px; max-width: 680px; }
.hero-def-text { font-size: 1rem; line-height: 1.6; color: var(--color-text-sub); }
.hero-no-money-tag { margin-top: 10px; font-size: 0.85rem; font-weight: 700; color: var(--color-crimson); }
.hero-actions { display: flex; gap: 14px; margin-bottom: 18px; }
.hero-keyboard-hint { font-size: 0.82rem; color: var(--color-text-muted); }

/* Grids & Cards */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.gap-sm { gap: 12px; }
.gap-md { gap: 18px; }
.gap-xs { gap: 8px; }

.problem-card { background: var(--color-bg-dark); border: 1px solid var(--color-border); padding: 18px; border-radius: var(--radius-md); }
.card-icon.warning {
    width: 36px; height: 36px; background: rgba(239, 68, 68, 0.12);
    color: var(--color-crimson); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; margin-bottom: 10px;
}

.problem-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.problem-card p { font-size: 0.88rem; color: var(--color-text-sub); line-height: 1.5; }

/* Flow Banner & Steps */
.flow-banner { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 14px 18px; }
.flow-title { font-size: 0.78rem; font-weight: 800; color: var(--color-crimson); text-transform: uppercase; margin-bottom: 6px; }
.flow-steps { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; flex-wrap: wrap; }
.f-step { background: rgba(255,255,255,0.05); padding: 3px 10px; border-radius: var(--radius-sm); }
.f-step.highlight { background: var(--color-crimson); color: white; font-weight: 800; }
.flow-steps i { color: var(--color-text-muted); font-size: 0.7rem; }

/* Use Case & Lists */
.usecase-item { background: var(--color-bg-dark); border: 1px solid var(--color-border); padding: 10px 14px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600; display: flex; align-items: center; gap: 10px; }
.two-column-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.content-box { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 20px; }
.box-title { font-size: 1.05rem; font-weight: 700; color: var(--color-crimson); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--color-border); padding-bottom: 8px; }
.bullet-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.bullet-list li { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--color-text-sub); }

.stat-banner { background: var(--color-bg-dark); border: 1px solid var(--color-crimson); border-radius: var(--radius-md); padding: 14px 22px; display: flex; align-items: center; gap: 14px; font-size: 0.95rem; color: var(--color-text-main); }

/* Screen Cards */
.screen-card { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 12px; display: flex; flex-direction: column; }
.screen-card.active-card { border-color: var(--color-crimson); }
.screen-tag { font-family: var(--font-heading); font-size: 0.72rem; font-weight: 800; color: var(--color-text-sub); background: var(--color-border); padding: 2px 8px; border-radius: var(--radius-full); width: fit-content; margin-bottom: 8px; }
.screen-tag.highlight { background: var(--color-crimson); color: white; }
.ui-mockup { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 10px; flex: 1; display: flex; flex-direction: column; gap: 6px; font-size: 0.78rem; }
.mock-title { font-weight: 700; color: var(--color-crimson); text-align: center; }
.mock-desc { font-size: 0.7rem; color: var(--color-text-muted); text-align: center; }

/* Scope Box */
.scope-container { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.scope-box { background: var(--color-bg-dark); border-radius: var(--radius-md); padding: 18px; }
.scope-box.included { border: 1px solid rgba(239, 68, 68, 0.3); }
.scope-box.excluded { border: 1px solid rgba(100, 116, 139, 0.3); }
.scope-header { display: flex; align-items: center; gap: 8px; font-size: 1rem; font-weight: 700; margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--color-border); }
.included .scope-header { color: var(--color-crimson); }
.excluded .scope-header { color: var(--color-text-muted); }
.check-list, .cross-list { list-style: none; display: flex; flex-direction: column; gap: 5px; }
.check-list li, .cross-list li { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; color: var(--color-text-sub); }
.check-list i { color: var(--color-crimson); }
.cross-list i { color: var(--color-text-muted); }

.simple-quote { background: rgba(255, 255, 255, 0.03); border-left: 3px solid var(--color-crimson); padding: 10px 16px; border-radius: 0 var(--radius-md) var(--radius-md) 0; font-size: 0.92rem; color: var(--color-text-main); font-style: italic; }

/* Custom Interactive Elements */
.user-profile-preview-card { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 14px 18px; display: flex; align-items: center; justify-content: space-between; }
.u-info { display: flex; align-items: center; gap: 12px; }
.u-avatar { font-size: 1.8rem; }
.u-tier { display: block; font-size: 0.8rem; color: var(--color-gold); font-weight: 700; }
.u-stats { font-size: 0.85rem; color: var(--color-text-sub); display: flex; flex-direction: column; text-align: right; }

.arena-match-versus-bar { display: flex; align-items: center; justify-content: space-between; background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 12px 20px; }
.arena-player { display: flex; flex-direction: column; gap: 2px; }
.arena-player.me .p-name { color: var(--color-crimson); font-weight: 700; }
.arena-player.opp .p-name { color: var(--color-gold); font-weight: 700; text-align: right; }
.p-score { font-family: var(--font-heading); font-size: 0.9rem; font-weight: 600; color: var(--color-text-sub); }
.arena-versus-badge { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 900; color: var(--color-crimson); }

.quiz-question-box { background: var(--color-bg-dark); border: 1.5px solid var(--color-border); border-radius: var(--radius-md); padding: 20px; text-align: center; }
.q-cat-tag { font-size: 0.75rem; font-weight: 800; color: var(--color-crimson); background: rgba(239, 68, 68, 0.1); padding: 2px 10px; border-radius: var(--radius-full); }
.q-title-text { font-size: 1.2rem; font-weight: 800; margin-top: 10px; color: var(--color-text-main); }

.evidence-submit-group { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.demo-input-group { display: flex; gap: 8px; }
.demo-input-group input { flex: 1; background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 8px 14px; color: white; font-family: var(--font-primary); font-size: 0.9rem; outline: none; }
.demo-input-group input:focus { border-color: var(--color-crimson); }

.match-detail-box { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 16px; }
.m-res-row { display: flex; justify-content: space-between; align-items: center; font-size: 0.95rem; }
.badge-change { font-family: var(--font-heading); font-weight: 800; font-size: 0.85rem; padding: 2px 8px; border-radius: var(--radius-full); }
.m-res-row.win .badge-change { background: rgba(239, 68, 68, 0.15); color: var(--color-crimson); }
.m-res-row.lose .badge-change { background: rgba(234, 179, 8, 0.15); color: var(--color-gold); }

/* Modals */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(13, 15, 18, 0.92); backdrop-filter: blur(8px); z-index: 1000; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity 0.2s ease, visibility 0.2s ease; }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal-content { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); width: 90%; max-width: 760px; max-height: 85vh; display: flex; flex-direction: column; box-shadow: 0 16px 40px rgba(0,0,0,0.6); overflow: hidden; }
.modal-header { padding: 14px 20px; border-bottom: 1px solid var(--color-border); display: flex; align-items: center; justify-content: space-between; background: var(--color-bg-dark); }
.modal-header h3 { font-size: 1.05rem; font-weight: 700; }
.btn-close { background: transparent; border: none; color: var(--color-text-sub); font-size: 1.2rem; cursor: pointer; }
.btn-close:hover { color: var(--color-crimson); }

.overview-content { padding: 20px; }
.overview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; overflow-y: auto; max-height: 60vh; }
.overview-card { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 10px 12px; cursor: pointer; display: flex; flex-direction: column; gap: 4px; }
.overview-card:hover, .overview-card.active { border-color: var(--color-crimson); }
.overview-card .num { font-family: var(--font-heading); font-weight: 800; color: var(--color-crimson); }
.overview-card .title { font-size: 0.85rem; font-weight: 700; }

.demo-brand { display: flex; align-items: center; gap: 8px; font-family: var(--font-heading); font-weight: 800; }
.demo-body { padding: 20px; overflow-y: auto; }
.demo-stage { display: none; flex-direction: column; gap: 14px; }
.demo-stage.active { display: flex; }

.demo-mode-picker { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.mode-opt { cursor: pointer; }
.mode-opt input { display: none; }
.mode-opt .opt-box { background: var(--color-bg-dark); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 10px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: 0.85rem; transition: all 0.15s ease; }
.mode-opt.active .opt-box, .mode-opt input:checked + .opt-box { border-color: var(--color-crimson); background: rgba(239, 68, 68, 0.08); color: var(--color-crimson); }

.demo-input-footer { display: flex; align-items: center; justify-content: space-between; }

.demo-result-card { background: var(--color-bg-dark); border: 1.5px solid var(--color-crimson); border-radius: var(--radius-md); padding: 18px; }
.result-card-header { text-align: center; border-bottom: 1px solid var(--color-border); padding-bottom: 10px; margin-bottom: 10px; }
.result-badge { font-family: var(--font-heading); font-size: 0.7rem; font-weight: 800; color: white; background: var(--color-crimson); padding: 2px 8px; border-radius: var(--radius-full); display: inline-block; margin-bottom: 4px; }
.result-card-title { font-size: 1.2rem; font-weight: 800; color: white; outline: none; }
.result-date { font-size: 0.72rem; color: var(--color-text-muted); margin-top: 2px; }
.result-card-footer { margin-top: 12px; text-align: center; font-size: 0.7rem; color: var(--color-text-muted); border-top: 1px solid rgba(255,255,255,0.05); padding-top: 8px; }
.demo-result-actions { display: flex; justify-content: center; gap: 8px; }

/* Mobile Rules */
@media (max-width: 800px) {
    .top-bar { padding: 0 14px; }
    .slide { padding: 12px; }
    .slide-content { padding: 18px; }
    .grid-2, .grid-3, .grid-4, .two-column-layout, .scope-container, .demo-mode-picker { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; width: 100%; }
    .hero-actions .btn { width: 100%; }
    .overview-grid { grid-template-columns: 1fr 1fr; }
}