/* ==========================================
   FIBER QUEST - GAME STYLES
   Premium Gaming Experience
   ========================================== */

/* ==========================================
   CSS VARIABLES & THEME
   ========================================== */
:root {
    /* Core Colors - FIBER BRAND */
    --bg-dark: #1C1C1C;
    --bg-card: #252525;
    --bg-card-hover: #2d2d2d;

    /* Accent Colors - FIBER PALETTE */
    --fiber-red: #B8243F;
    --fiber-red-light: #d42e4c;
    --fiber-red-dark: #8a1b2f;
    --fiber-white: #FFFFFF;
    --fiber-gray-light: #EFEFEF;
    --fiber-gray: #CFCFCF;
    --fiber-gray-dark: #666666;

    /* Legacy names for compatibility */
    --neon-pink: #B8243F;
    --neon-purple: #8a1b2f;
    --neon-blue: #B8243F;
    --neon-green: #4CAF50;
    --neon-yellow: #FFC107;
    --neon-orange: #FF5722;

    /* Gradients - FIBER STYLE */
    --gradient-main: linear-gradient(135deg, #B8243F 0%, #8a1b2f 100%);
    --gradient-xp: linear-gradient(90deg, #B8243F 0%, #d42e4c 100%);
    --gradient-gold: linear-gradient(135deg, #FFC107 0%, #FF9800 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0) 100%);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-glow: 0 0 20px rgba(184, 36, 63, 0.4);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);

    /* Fonts */
    --font-game: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==========================================
   RESET & BASE
   ========================================== */
*, *::before, *::after {
    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-body);
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* ==========================================
   GAME LOADER
   ========================================== */
.game-loader {
    position: fixed;
    inset: 0;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s ease;
}

.game-loader.active {
    opacity: 1;
    visibility: visible;
}

.loader-content {
    text-align: center;
}

.loader-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo-icon {
    font-size: 48px;
    animation: pulse 1.5s ease infinite;
}

.logo-text {
    font-family: var(--font-game);
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-quest {
    font-family: var(--font-game);
    font-size: 36px;
    font-weight: 400;
    color: var(--text-secondary);
}

.loader-bar {
    width: 200px;
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto 16px;
}

.loader-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-main);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.loader-text {
    font-size: 14px;
    color: var(--text-muted);
}

/* ==========================================
   GAME HEADER
   ========================================== */
.game-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    z-index: 1000;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.game-header:not(.hidden) {
    transform: translateY(0);
}

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

.level-badge {
    width: 32px;
    height: 32px;
    background: var(--gradient-main);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-game);
    font-weight: 700;
    font-size: 14px;
}

.xp-bar-mini {
    width: 60px;
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
}

.xp-fill-mini {
    height: 100%;
    width: 0%;
    background: var(--gradient-xp);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.streak-counter {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: rgba(255, 107, 53, 0.2);
    border: 1px solid rgba(255, 107, 53, 0.4);
    border-radius: var(--radius-lg);
}

.streak-icon {
    font-size: 16px;
}

.streak-value {
    font-family: var(--font-game);
    font-weight: 700;
    color: var(--neon-orange);
}

.xp-display {
    display: flex;
    align-items: center;
    gap: 4px;
}

.xp-icon {
    font-size: 16px;
}

.xp-value {
    font-family: var(--font-game);
    font-weight: 700;
    font-size: 16px;
    color: var(--fiber-red);
}

.xp-label {
    font-size: 12px;
    color: var(--text-muted);
}

/* ==========================================
   TOAST NOTIFICATIONS
   ========================================== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 12px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--neon-green);
    box-shadow: var(--shadow-card);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.xp {
    border-left-color: var(--neon-blue);
}

.toast.achievement {
    border-left-color: var(--neon-yellow);
}

.toast.streak {
    border-left-color: var(--neon-orange);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ==========================================
   ACHIEVEMENT POPUP
   ========================================== */
.achievement-popup {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.achievement-popup.active {
    opacity: 1;
    visibility: visible;
}

.achievement-content {
    text-align: center;
    position: relative;
    animation: achievementPop 0.5s ease;
}

@keyframes achievementPop {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.achievement-glow {
    position: absolute;
    inset: -50px;
    background: radial-gradient(circle, rgba(255, 208, 0, 0.3) 0%, transparent 70%);
    animation: pulse 2s ease infinite;
}

.achievement-icon {
    font-size: 80px;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    animation: bounce 0.6s ease;
}

.achievement-label {
    display: block;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--neon-yellow);
    margin-bottom: 8px;
}

.achievement-title {
    font-family: var(--font-game);
    font-size: 24px;
    margin-bottom: 8px;
}

.achievement-desc {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.achievement-xp {
    display: inline-block;
    padding: 8px 20px;
    background: var(--gradient-xp);
    border-radius: var(--radius-lg);
    font-family: var(--font-game);
    font-weight: 700;
}

/* ==========================================
   PARTICLES BACKGROUND
   ========================================== */
.particles-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--fiber-red);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.5;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ==========================================
   GAME SCREENS
   ========================================== */
.game-screen {
    min-height: 100vh;
    display: none;
    padding: var(--spacing-xl) var(--spacing-md);
    padding-top: 80px;
    position: relative;
    z-index: 1;
}

.game-screen.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

/* Force processing screen to stay hidden until active */
#screenProcessing:not(.active) {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
    position: absolute !important;
    left: -9999px !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.screen-content {
    max-width: 500px;
    margin: 0 auto;
}

/* ==========================================
   START SCREEN
   ========================================== */
#screenStart {
    padding-top: 40px;
}

.start-hero {
    text-align: center;
}

.hero-visual {
    position: relative;
    height: 200px;
    margin-bottom: var(--spacing-xl);
}

.floating-elements {
    position: absolute;
    inset: 0;
}

.float-el {
    position: absolute;
    font-size: 32px;
    animation: floatElement 3s ease-in-out infinite;
}

.el1 { top: 10%; left: 10%; animation-delay: 0s; }
.el2 { top: 20%; right: 15%; animation-delay: 0.5s; }
.el3 { bottom: 30%; left: 20%; animation-delay: 1s; }
.el4 { bottom: 20%; right: 10%; animation-delay: 1.5s; }
.el5 { top: 40%; left: 5%; animation-delay: 2s; }

@keyframes floatElement {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-15px) rotate(10deg);
    }
}

.main-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 80px;
}

.pulse-glow {
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        filter: drop-shadow(0 0 10px var(--fiber-red));
    }
    50% {
        filter: drop-shadow(0 0 30px var(--fiber-red)) drop-shadow(0 0 50px var(--fiber-red-dark));
    }
}

.game-title {
    margin-bottom: var(--spacing-md);
}

.title-main {
    font-family: var(--font-body);
    font-size: 28px;
    font-weight: 400;
    color: var(--text-primary);
    display: block;
    margin-bottom: 8px;
}

.title-highlight {
    font-family: var(--font-game);
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.title-fiber {
    font-family: var(--font-game);
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.title-quest {
    font-family: var(--font-game);
    font-size: 32px;
    font-weight: 400;
    color: var(--text-secondary);
    display: block;
}

.game-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.game-subtitle strong {
    color: var(--fiber-red);
}

.game-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.feature-icon {
    font-size: 24px;
}

.feature-text {
    font-size: 12px;
    color: var(--text-secondary);
}

.start-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

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

.stat-value {
    display: block;
    font-family: var(--font-game);
    font-size: 24px;
    font-weight: 700;
    color: var(--fiber-red);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.2);
}

.btn-start {
    width: 100%;
    padding: 20px 40px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-family: var(--font-game);
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.btn-start:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(184, 36, 63, 0.5);
}

.pulse-btn::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-main);
    border-radius: var(--radius-lg);
    z-index: -1;
    animation: pulseBorder 2s ease-in-out infinite;
}

@keyframes pulseBorder {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.02);
    }
}

/* ==========================================
   REGISTER SCREEN
   ========================================== */
.register-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.register-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.register-header h2 {
    font-family: var(--font-game);
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
}

.register-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.register-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.input-group {
    position: relative;
}

.input-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.input-icon {
    font-size: 16px;
}

.input-group input {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 16px;
    transition: all var(--transition-normal);
}

.input-group input:focus {
    outline: none;
    border-color: var(--fiber-red);
    box-shadow: 0 0 20px rgba(184, 36, 63, 0.25);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.input-glow {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: width var(--transition-normal);
}

.input-group input:focus ~ .input-glow {
    width: 100%;
}

.checkbox-group {
    margin-top: var(--spacing-sm);
}

.custom-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
}

.custom-checkbox input {
    display: none;
}

.checkmark {
    width: 24px;
    height: 24px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-normal);
}

.custom-checkbox input:checked ~ .checkmark {
    background: var(--gradient-main);
    border-color: transparent;
}

.custom-checkbox input:checked ~ .checkmark::after {
    content: '✓';
    color: white;
    font-size: 14px;
}

.checkbox-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.btn-register {
    width: 100%;
    padding: 18px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-game);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all var(--transition-normal);
}

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

.btn-xp {
    background: rgba(0,0,0,0.2);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
}

.register-bonus {
    margin-top: var(--spacing-lg);
    padding: 16px;
    background: rgba(255, 208, 0, 0.1);
    border: 1px solid rgba(255, 208, 0, 0.3);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: left;
}

.bonus-icon {
    font-size: 24px;
}

.bonus-text {
    font-size: 14px;
    color: var(--neon-yellow);
}

/* ==========================================
   TUTORIAL SCREEN
   ========================================== */
.tutorial-slides {
    min-height: 300px;
    position: relative;
}

.tutorial-slide {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.tutorial-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
}

.tutorial-slide h3 {
    font-family: var(--font-game);
    font-size: 24px;
    margin-bottom: var(--spacing-md);
}

.tutorial-slide p {
    color: var(--text-secondary);
    max-width: 300px;
}

.tutorial-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: var(--spacing-xl) 0;
}

.dot {
    width: 10px;
    height: 10px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.dot.active {
    background: var(--fiber-red);
    width: 30px;
    border-radius: 5px;
}

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

.btn-skip {
    padding: 12px 24px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-skip:hover {
    border-color: rgba(255,255,255,0.4);
    color: white;
}

.btn-next {
    padding: 12px 32px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-normal);
}

.btn-next:hover {
    transform: translateX(4px);
}

/* ==========================================
   ARENA SCREEN (QUIZ)
   ========================================== */
#screenArena {
    padding-top: 70px;
}

.arena-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.quest-progress {
    margin-bottom: var(--spacing-xl);
}

.quest-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.quest-label {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.quest-number {
    font-family: var(--font-game);
    font-weight: 700;
    color: var(--fiber-red);
}

.quest-bar {
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    position: relative;
    overflow: visible;
}

.quest-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-xp);
    border-radius: 4px;
    transition: width 0.5s ease;
    position: relative;
}

.quest-fill::after {
    content: '';
    position: absolute;
    right: -2px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 10px var(--fiber-red);
}

.quest-checkpoints {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: space-between;
    padding: 0 2px;
}

.checkpoint {
    width: 12px;
    height: 12px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translateY(-2px);
    transition: all var(--transition-normal);
}

.checkpoint.completed {
    background: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green);
}

.checkpoint.current {
    background: var(--fiber-red);
    box-shadow: 0 0 10px var(--fiber-red);
    animation: pulse 1s ease infinite;
}

/* Challenge Cards */
.challenges-container {
    position: relative;
}

.challenge-card {
    display: none;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255,255,255,0.1);
    overflow: hidden;
    animation: cardIn 0.5s ease;
}

.challenge-card.active {
    display: block;
}

@keyframes cardIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.type-icon {
    font-size: 18px;
}

.type-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--fiber-red);
}

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

.reward-xp {
    font-family: var(--font-game);
    font-size: 14px;
    color: var(--fiber-red);
}

.reward-badge {
    font-size: 18px;
}

.challenge-body {
    padding: var(--spacing-lg);
}

.challenge-intro {
    font-size: 15px;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

.challenge-question {
    font-family: var(--font-game);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.challenge-question .player-name-slot {
    color: var(--fiber-red);
}

.challenge-instruction {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.challenge-instruction strong {
    color: var(--fiber-red);
}

.challenge-instruction .player-name-slot {
    color: var(--fiber-red);
    font-weight: 600;
}

.multi-hint {
    color: var(--neon-yellow);
    font-size: 14px;
    margin-bottom: var(--spacing-md);
}

/* Choice Grid */
.choice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

@media (max-width: 500px) {
    .choice-grid {
        grid-template-columns: 1fr;
    }
}

.option-card {
    background: rgba(255,255,255,0.03);
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.option-card:hover {
    border-color: rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
    transform: translateY(-2px);
}

.option-card.selected {
    border-color: var(--fiber-red);
    background: rgba(184, 36, 63, 0.15);
}

.option-card.selected .option-select {
    background: var(--fiber-red);
}

.option-card.selected .option-select::after {
    content: '✓';
    color: white;
}

.option-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-sm);
}

.option-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.option-title {
    font-family: var(--font-game);
    font-size: 14px;
    font-weight: 600;
}

.option-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

.option-select {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all var(--transition-normal);
}

/* Multi-select */
.multi-select {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.multi-select .option-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

.multi-select .option-icon {
    font-size: 24px;
    margin-bottom: 0;
}

.multi-select .option-title {
    flex: 1;
}

.option-check {
    width: 28px;
    height: 28px;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    opacity: 0;
    transition: all var(--transition-normal);
}

.multi-select .option-card.selected .option-check {
    opacity: 1;
    background: var(--neon-green);
    border-color: var(--neon-green);
}

.btn-confirm-multi {
    width: 100%;
    margin-top: var(--spacing-lg);
    padding: 16px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-game);
    font-size: 14px;
    cursor: pointer;
    opacity: 0.5;
    transition: all var(--transition-normal);
}

.btn-confirm-multi:not(:disabled) {
    opacity: 1;
}

.btn-confirm-multi:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Practical Tests */
.practical-test {
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.test-visual {
    margin-bottom: var(--spacing-lg);
}

.foot-animation {
    position: relative;
    margin: 0 auto var(--spacing-lg);
}

.foot-base {
    font-size: 80px;
    animation: wiggle 2s ease-in-out infinite;
}

@keyframes wiggle {
    0%, 100% { transform: rotate(-5deg); }
    50% { transform: rotate(5deg); }
}

.grip-indicator {
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 40px;
}

.grip-arrow {
    font-size: 24px;
    color: var(--fiber-red);
    animation: gripPulse 1s ease infinite;
}

.grip-arrow.left { animation-delay: 0s; }
.grip-arrow.right { animation-delay: 0.5s; }

@keyframes gripPulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
}

.btn-do-test {
    padding: 16px 32px;
    background: var(--gradient-xp);
    border: none;
    border-radius: var(--radius-md);
    color: var(--bg-dark);
    font-family: var(--font-game);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-normal);
}

.btn-do-test:hover {
    transform: scale(1.05);
}

.timer-badge {
    background: rgba(0,0,0,0.2);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
}

/* Timer */
.test-timer {
    margin: var(--spacing-lg) auto;
}

.timer-circle {
    position: relative;
    width: 150px;
    height: 150px;
    margin: 0 auto var(--spacing-md);
}

.timer-circle svg {
    transform: rotate(-90deg);
}

.timer-bg {
    fill: none;
    stroke: rgba(255,255,255,0.1);
    stroke-width: 8;
}

.timer-progress {
    fill: none;
    stroke: url(#timerGradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 0.1s linear;
}

.timer-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-game);
    font-size: 48px;
    font-weight: 700;
}

.timer-instruction {
    color: var(--text-secondary);
    animation: pulse 1s ease infinite;
}

/* Balance Test */
.balance-animation {
    margin-bottom: var(--spacing-lg);
}

.balance-figure {
    font-size: 80px;
    animation: balance 1s ease-in-out infinite;
}

@keyframes balance {
    0%, 100% { transform: rotate(-3deg); }
    50% { transform: rotate(3deg); }
}

.balance-timer-display {
    font-family: var(--font-game);
    font-size: 48px;
    color: var(--fiber-red);
    margin-top: var(--spacing-md);
}

.balance-controls {
    margin-top: var(--spacing-lg);
}

.balance-instruction {
    color: var(--neon-yellow);
    margin-bottom: var(--spacing-md);
    animation: pulse 1s ease infinite;
}

.btn-stop-balance {
    padding: 20px 60px;
    background: var(--neon-orange);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-family: var(--font-game);
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    animation: pulseGlow 1s ease infinite;
}

.balance-rating {
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.btn-continue-challenge {
    width: 100%;
    padding: 16px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-game);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

/* Shoe Showcase */
.shoe-showcase {
    margin: var(--spacing-lg) 0;
}

.shoe-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.shoe-bad, .shoe-good {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    flex: 1;
    max-width: 120px;
}

.shoe-bad {
    background: rgba(255, 87, 87, 0.1);
    border: 1px solid rgba(255, 87, 87, 0.3);
}

.shoe-good {
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.shoe-icon {
    font-size: 40px;
    display: block;
    margin-bottom: 8px;
}

.shoe-label {
    font-size: 12px;
    color: var(--text-secondary);
    display: block;
}

.shoe-effect {
    font-family: var(--font-game);
    font-size: 14px;
    display: block;
    margin-top: 4px;
}

.shoe-bad .shoe-effect {
    color: #ff5757;
}

.shoe-good .shoe-effect {
    color: var(--neon-green);
}

.shoe-vs {
    font-family: var(--font-game);
    font-size: 18px;
    color: var(--text-muted);
}

/* Week Display */
.frequency-visual {
    margin: var(--spacing-lg) 0;
}

.week-display {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.day {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.day.active {
    background: var(--neon-green);
    color: var(--bg-dark);
}

/* Transformation Visual */
.final-visual {
    margin: var(--spacing-lg) 0;
}

.transformation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.before, .after {
    text-align: center;
}

.before span:first-child, .after span:first-child {
    font-size: 48px;
    display: block;
}

.label {
    font-size: 12px;
    color: var(--text-muted);
}

.arrow {
    font-size: 32px;
    color: var(--neon-green);
    animation: arrowPulse 1s ease infinite;
}

@keyframes arrowPulse {
    0%, 100% { transform: translateX(0); opacity: 0.5; }
    50% { transform: translateX(5px); opacity: 1; }
}

/* Challenge Footer */
.challenge-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255,255,255,0.02);
    border-top: 1px solid rgba(255,255,255,0.05);
}

.science-tip {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.tip-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.science-tip strong {
    color: var(--fiber-red);
}

/* Hidden helper class */
.hidden {
    display: none !important;
}

/* ==========================================
   PROCESSING SCREEN
   ========================================== */
#screenProcessing.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.processing-visual {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-xl);
}

.dna-helix {
    position: absolute;
    inset: 0;
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.helix-strand {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--fiber-red);
    border-bottom-color: var(--fiber-red-light);
    border-radius: 50%;
}

.helix-strand:nth-child(2) {
    transform: rotate(60deg);
    animation-delay: -0.5s;
}

.scan-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--fiber-red);
    top: 0;
    animation: scan 2s ease-in-out infinite;
    box-shadow: 0 0 20px var(--fiber-red);
}

@keyframes scan {
    0%, 100% { top: 0; }
    50% { top: 100%; }
}

.processing-title {
    font-family: var(--font-game);
    font-size: 24px;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.processing-steps {
    margin-bottom: var(--spacing-xl);
}

.proc-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    opacity: 0.4;
    transition: all var(--transition-normal);
}

.proc-step.active {
    opacity: 1;
}

.proc-step.done {
    opacity: 1;
}

.proc-step.done .step-icon {
    color: var(--neon-green);
}

.step-icon {
    font-size: 18px;
}

.step-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.processing-progress {
    display: flex;
    align-items: center;
    gap: 12px;
}

.proc-bar {
    flex: 1;
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    overflow: hidden;
}

.proc-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-xp);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.proc-percent {
    font-family: var(--font-game);
    font-size: 16px;
    color: var(--fiber-red);
    min-width: 50px;
}

/* ==========================================
   RESULT SCREEN
   ========================================== */
.result-header {
    position: relative;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.result-confetti {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.confetti-piece {
    position: absolute;
    width: 10px;
    height: 10px;
    animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(-100%) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(500%) rotate(720deg);
        opacity: 0;
    }
}

.result-badge-main {
    display: inline-block;
    padding: var(--spacing-lg) var(--spacing-2xl);
    background: var(--bg-card);
    border: 2px solid;
    border-radius: var(--radius-xl);
    animation: badgePop 0.5s ease;
}

@keyframes badgePop {
    0% { transform: scale(0.5); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.result-badge-main.critical {
    border-color: #ff4444;
    background: rgba(255, 68, 68, 0.1);
}

.result-badge-main.sleeping {
    border-color: var(--neon-orange);
    background: rgba(255, 107, 53, 0.1);
}

.result-badge-main.waking {
    border-color: var(--neon-yellow);
    background: rgba(255, 208, 0, 0.1);
}

.result-badge-main.free {
    border-color: var(--neon-green);
    background: rgba(0, 255, 136, 0.1);
}

.badge-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 8px;
}

.badge-title {
    font-family: var(--font-game);
    font-size: 24px;
    display: block;
}

.result-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    flex: 1;
    max-width: 120px;
}

.stat-card .stat-icon {
    font-size: 24px;
    display: block;
    margin-bottom: 4px;
}

.stat-card .stat-value {
    font-family: var(--font-game);
    font-size: 28px;
    font-weight: 700;
    display: block;
}

.stat-card.xp-total .stat-value {
    color: var(--fiber-red);
}

.stat-card.level .stat-value {
    color: var(--fiber-red-light);
}

.stat-card.badges .stat-value {
    color: var(--neon-yellow);
}

.stat-card .stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.result-diagnosis {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.result-diagnosis h3 {
    font-family: var(--font-game);
    font-size: 18px;
    margin-bottom: var(--spacing-md);
    color: var(--fiber-red);
}

.result-diagnosis p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.result-diagnosis ul {
    list-style: none;
    padding: 0;
}

.result-diagnosis li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.diagnosis-impact {
    background: rgba(184, 36, 63, 0.1);
    border-left: 3px solid var(--fiber-red);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.diagnosis-impact p {
    margin-bottom: var(--spacing-sm);
}

.diagnosis-impact ul {
    margin: 0;
}

.diagnosis-hope {
    font-size: 15px;
    color: var(--neon-green) !important;
    margin-top: var(--spacing-md);
}

/* Recommendation list */
.recommendation-list {
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0;
}

.recommendation-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.recommendation-list li strong {
    color: var(--fiber-red);
}

.result-achievements {
    margin-bottom: var(--spacing-lg);
}

.result-achievements h3 {
    font-family: var(--font-game);
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.achievements-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.achievement-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    font-size: 12px;
}

.achievement-badge.locked {
    opacity: 0.4;
    filter: grayscale(1);
}

.result-recommendation {
    background: linear-gradient(135deg, rgba(184, 36, 63, 0.1) 0%, rgba(138, 27, 47, 0.1) 100%);
    border: 1px solid rgba(184, 36, 63, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.result-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.btn-primary-result {
    width: 100%;
    padding: 18px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-game);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all var(--transition-normal);
}

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

.btn-secondary-result {
    width: 100%;
    padding: 14px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all var(--transition-normal);
}

.btn-secondary-result:hover {
    border-color: rgba(255,255,255,0.4);
    color: white;
}

/* ==========================================
   PRODUCT SCREEN
   ========================================== */
.product-hero {
    text-align: center;
}

.product-story {
    background: rgba(184, 36, 63, 0.1);
    border-left: 3px solid var(--fiber-red);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    text-align: left;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.story-text {
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.product-badge-earned {
    display: inline-block;
    padding: 8px 16px;
    background: var(--gradient-gold);
    border-radius: var(--radius-lg);
    font-size: 12px;
    font-weight: 600;
    color: var(--bg-dark);
    margin-bottom: var(--spacing-md);
}

.product-hero h2 {
    font-family: var(--font-game);
    font-size: 24px;
    margin-bottom: var(--spacing-lg);
}

.product-card-main {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.product-image-wrapper {
    position: relative;
    background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, transparent 100%);
    padding: var(--spacing-lg);
}

.product-image-wrapper img {
    width: 100%;
    max-width: 300px;
    display: block;
    margin: 0 auto;
    border-radius: var(--radius-md);
}

.product-discount-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--fiber-red);
    color: white;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    text-align: center;
}

.product-discount-badge span {
    display: block;
    font-size: 10px;
    font-weight: 600;
}

.product-discount-badge strong {
    display: block;
    font-family: var(--font-game);
    font-size: 16px;
}

.product-info-main {
    padding: var(--spacing-lg);
}

.product-info-main h3 {
    font-family: var(--font-game);
    font-size: 20px;
    margin-bottom: 8px;
}

.product-rating {
    font-size: 14px;
    color: var(--neon-yellow);
    margin-bottom: var(--spacing-md);
}

.product-rating span {
    color: var(--text-muted);
}

.product-info-main > p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.product-benefits-list {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.product-benefits-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-size: 14px;
    color: var(--text-secondary);
}

.product-benefits-list li:last-child {
    border-bottom: none;
}

.product-price-box {
    margin-bottom: var(--spacing-md);
}

.price-old {
    text-decoration: line-through;
    color: var(--text-muted);
    font-size: 16px;
    margin-right: 8px;
}

.price-new {
    font-family: var(--font-game);
    font-size: 32px;
    color: var(--fiber-red);
}

.price-economy {
    display: block;
    font-size: 14px;
    color: var(--neon-green);
    margin-top: 4px;
}

.product-guarantee {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    background: rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.product-guarantee span {
    font-size: 20px;
}

.product-guarantee p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.product-guarantee strong {
    color: var(--neon-green);
}

.coupon-box {
    background: rgba(184, 36, 63, 0.1);
    border: 1px dashed var(--fiber-red);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.coupon-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.coupon-code {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-dark);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
}

.coupon-code span {
    font-family: var(--font-game);
    font-size: 18px;
    color: var(--fiber-red);
    letter-spacing: 2px;
}

.btn-copy-coupon {
    background: transparent;
    border: none;
    font-size: 20px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.btn-copy-coupon:hover {
    opacity: 1;
}

.coupon-timer {
    display: block;
    font-size: 12px;
    color: var(--neon-yellow);
    margin-top: 8px;
}

.coupon-label .player-name-slot {
    color: var(--fiber-red);
    font-weight: 600;
}

.product-badge-earned .player-name-slot {
    font-weight: 700;
}

.btn-buy {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 18px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-game);
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    transition: all var(--transition-normal);
}

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

.alternative-product {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.alternative-product p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 8px;
}

.btn-alternative {
    color: var(--fiber-red);
    text-decoration: none;
    font-size: 14px;
}

.btn-alternative:hover {
    text-decoration: underline;
}

.final-share {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
}

.final-share p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: var(--spacing-md);
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.share-btn {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.share-btn svg {
    width: 24px;
    height: 24px;
}

.share-btn.whatsapp {
    background: #25D366;
    color: white;
}

.share-btn.instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
}

.share-btn.copy {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid rgba(255,255,255,0.1);
}

.share-btn:hover {
    transform: translateY(-3px);
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 480px) {
    :root {
        --spacing-lg: 20px;
        --spacing-xl: 28px;
    }

    .title-fiber {
        font-size: 36px;
    }

    .title-quest {
        font-size: 24px;
    }

    .challenge-question {
        font-size: 18px;
    }

    .game-features {
        gap: var(--spacing-md);
    }

    .feature-text {
        font-size: 11px;
    }

    .result-stats {
        gap: var(--spacing-sm);
    }

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

    .stat-card .stat-value {
        font-size: 24px;
    }
}