/* ============================================
   DESIGN SYSTEM & CSS VARIABLES
   ============================================ */
:root {
    /* Colors - Vibrant & Modern */
    --color-bg: #0a0a0a;
    --color-surface: #1a1a1a;
    --color-surface-elevated: #252525;

    --color-primary: #ff006e;
    --color-primary-glow: rgba(255, 0, 110, 0.3);

    --color-secondary: #00f5ff;
    --color-secondary-glow: rgba(0, 245, 255, 0.3);

    --color-success: #06ffa5;
    --color-danger: #ff006e;

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #666666;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #ff006e 0%, #ff4d94 100%);
    --gradient-secondary: linear-gradient(135deg, #00f5ff 0%, #00d4ff 100%);
    --gradient-success: linear-gradient(135deg, #06ffa5 0%, #00d4a0 100%);
    --gradient-bg: linear-gradient(180deg, #0a0a0a 0%, #1a0a14 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow-primary: 0 0 40px var(--color-primary-glow);
    --shadow-glow-secondary: 0 0 40px var(--color-secondary-glow);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index */
    --z-base: 1;
    --z-elevated: 10;
    --z-modal: 100;
    --z-overlay: 1000;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--gradient-bg);
    color: var(--color-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Prevent pull-to-refresh on mobile */
body {
    overscroll-behavior-y: contain;
}

/* ============================================
   HEADER
   ============================================ */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: var(--z-elevated);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cap-emoji {
    font-size: var(--font-size-2xl);
    animation: float 3s ease-in-out infinite;
}

.logo h1 {
    font-size: var(--font-size-xl);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.streak {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-surface-elevated);
    border-radius: var(--radius-xl);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.fire-emoji {
    font-size: var(--font-size-xl);
    animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   CARD CONTAINER
   ============================================ */
.card-container {
    max-width: 500px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: calc(100vh - 300px);
    display: flex;
    align-items: center;
    justify-content: center;
}

#card-stack {
    position: relative;
    width: 100%;
    height: 600px;
}

/* ============================================
   CARD STYLES
   ============================================ */
.card {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    cursor: grab;
    user-select: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card:active {
    cursor: grabbing;
}

.card.flipped .card-front {
    transform: rotateY(180deg);
}

.card.flipped .card-back {
    transform: rotateY(0deg);
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    transition: transform var(--transition-slow);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-xl);
}

.card-front {
    transform: rotateY(0deg);
}

.card-back {
    transform: rotateY(180deg);
    background: var(--color-surface-elevated);
}

.card-header {
    margin-bottom: auto;
}

.card-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    gap: var(--spacing-lg);
}

.card-quote {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text-primary);
}

.card-author {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    font-weight: 600;
}

.card-year {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.flip-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: rgba(255, 0, 110, 0.1);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    margin-top: auto;
    animation: bounce 2s ease-in-out infinite;
}

.card-reality {
    font-size: var(--font-size-xl);
    font-weight: 700;
    line-height: 1.4;
    color: var(--color-text-primary);
    text-align: center;
}

.reality-emoji {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.card-votes {
    margin-top: auto;
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
}

.vote-stats {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-md);
}

.vote-stat {
    text-align: center;
}

.vote-percentage {
    font-size: var(--font-size-2xl);
    font-weight: 900;
    display: block;
}

.vote-percentage.hypocrite {
    color: var(--color-danger);
}

.vote-percentage.real {
    color: var(--color-success);
}

.vote-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    font-weight: 600;
    margin-top: var(--spacing-xs);
}

/* Card Stack Effect */
.card:nth-child(2) {
    transform: scale(0.95) translateY(10px);
    opacity: 0.7;
    z-index: -1;
}

.card:nth-child(3) {
    transform: scale(0.9) translateY(20px);
    opacity: 0.4;
    z-index: -2;
}

/* Swipe Animations */
.card.swiping-left {
    border-color: var(--color-danger);
    box-shadow: 0 0 40px rgba(255, 0, 110, 0.5);
}

.card.swiping-right {
    border-color: var(--color-success);
    box-shadow: 0 0 40px rgba(6, 255, 165, 0.5);
}

/* ============================================
   SWIPE INDICATORS
   ============================================ */
.swipe-indicators {
    position: fixed;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: var(--z-elevated);
}

.indicator {
    position: absolute;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 900;
    font-size: var(--font-size-lg);
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.indicator-left {
    left: var(--spacing-lg);
    background: var(--gradient-primary);
    box-shadow: var(--shadow-glow-primary);
}

.indicator-right {
    right: var(--spacing-lg);
    background: var(--gradient-success);
    box-shadow: var(--shadow-glow-secondary);
}

.indicator.active {
    opacity: 1;
    transform: scale(1);
}

.indicator-emoji {
    font-size: var(--font-size-2xl);
}

/* ============================================
   ACTION BUTTONS
   ============================================ */
.action-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    max-width: 500px;
    margin: 0 auto;
}

.action-btn {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.action-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: inherit;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.action-btn:hover::before {
    opacity: 0.8;
}

.action-btn:active {
    transform: scale(0.9);
}

.hypocrite-btn {
    background: var(--gradient-primary);
}

.hypocrite-btn:hover {
    box-shadow: var(--shadow-glow-primary);
    transform: scale(1.1);
}

.flip-btn {
    width: 60px;
    height: 60px;
    background: var(--color-surface-elevated);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.flip-btn:hover {
    background: var(--color-surface);
    transform: scale(1.1);
}

.real-btn {
    background: var(--gradient-success);
}

.real-btn:hover {
    box-shadow: var(--shadow-glow-secondary);
    transform: scale(1.1);
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
}

.empty-content {
    max-width: 400px;
    margin: 0 auto;
}

.trophy-emoji {
    font-size: 5rem;
    display: block;
    margin-bottom: var(--spacing-lg);
    animation: bounce 2s ease-in-out infinite;
}

.empty-state h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.empty-state p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.restart-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-xl);
    color: var(--color-text-primary);
    font-weight: 700;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.restart-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-primary);
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-lg);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    position: relative;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    font-size: var(--font-size-2xl);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.modal h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-surface-elevated);
    border-radius: var(--radius-md);
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 900;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    margin-top: var(--spacing-xs);
    font-weight: 600;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-surface-elevated);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    color: var(--color-text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.footer-btn:hover {
    background: var(--color-surface);
    transform: translateY(-2px);
    color: var(--color-primary);
}

.disclaimer {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden {
    display: none !important;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .logo h1 {
        font-size: var(--font-size-lg);
    }

    .card-container {
        padding: var(--spacing-md);
    }

    #card-stack {
        height: 500px;
    }

    .card-quote {
        font-size: var(--font-size-xl);
    }

    .action-btn {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-xl);
    }

    .flip-btn {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {

    .card-front,
    .card-back {
        padding: var(--spacing-lg);
    }

    .card-quote {
        font-size: var(--font-size-lg);
    }

    .card-reality {
        font-size: var(--font-size-lg);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}