/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Bangers&family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* ==================== GLOBAL STYLES ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(180deg, #1a0933 0%, #2d1055 30%, #4a1a7d 60%, #5e2291 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* ==================== ANIMATED STARS BACKGROUND ==================== */
.stars {
    position: fixed;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    animation: twinkle 3s infinite ease-in-out;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.3);
    }
}

/* Add glowing stars */
.star:nth-child(3n) {
    box-shadow: 0 0 15px rgba(255, 255, 100, 0.9);
}

.star:nth-child(5n) {
    box-shadow: 0 0 12px rgba(100, 200, 255, 0.9);
}

/* ==================== PHONE FRAME ==================== */
.phone-frame {
    background: linear-gradient(145deg, #1a0933, #2d1055);
    border-radius: 40px;
    padding: 20px;
    box-shadow: 
        0 30px 80px rgba(0, 0, 0, 0.6),
        inset 0 0 30px rgba(138, 43, 226, 0.3),
        0 0 100px rgba(138, 43, 226, 0.2);
    border: 3px solid rgba(138, 43, 226, 0.4);
    position: relative;
    max-width: 450px;
    margin: 0 auto;
}

/* Phone Notch */
.phone-frame::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: linear-gradient(180deg, #0a0520, #1a0933);
    border-radius: 0 0 20px 20px;
    z-index: 10;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

/* Camera and Speaker */
.phone-frame::after {
    content: '';
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-20px);
    width: 12px;
    height: 12px;
    background: radial-gradient(circle, #1a2a4a, #0a0520);
    border-radius: 50%;
    z-index: 11;
    box-shadow: 
        30px 0 0 -4px rgba(50, 50, 100, 0.6),
        0 0 5px rgba(100, 150, 255, 0.3);
}

.phone-content {
    background: linear-gradient(180deg, #2d1055 0%, #3d1b6b 50%, #4a1a7d 100%);
    border-radius: 30px;
    padding: 50px 20px 30px;
    min-height: 750px;
    position: relative;
    overflow: hidden;
}

/* Animated background glow */
.phone-content::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(138, 43, 226, 0.15) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

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

/* Sparkle effect */
.phone-content::after {
    content: '';
    position: absolute;
    top: 10%;
    right: 10%;
    width: 4px;
    height: 4px;
    background: white;
    border-radius: 50%;
    box-shadow: 
        -80px 20px 0 1px rgba(255, 255, 255, 0.4),
        -120px 80px 0 2px rgba(255, 255, 255, 0.3),
        40px 100px 0 1px rgba(255, 255, 255, 0.5),
        100px 40px 0 1.5px rgba(255, 255, 255, 0.4);
    animation: sparkle 3s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* ==================== GAME TITLE ==================== */
.game-title {
    font-family: 'Bangers', cursive;
    font-size: 2.8rem;
    letter-spacing: 3px;
    text-shadow: 
        3px 3px 0px #ff6b35,
        6px 6px 0px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(255, 215, 0, 0.6),
        0 0 50px rgba(255, 215, 0, 0.3);
    animation: titleGlow 2s ease-in-out infinite;
    line-height: 1.2;
}

@keyframes titleGlow {
    0%, 100% {
        filter: brightness(1);
        transform: scale(1);
    }
    50% {
        filter: brightness(1.2);
        transform: scale(1.02);
    }
}

.title-underline {
    width: 150px;
    height: 4px;
    background: linear-gradient(90deg, transparent, #ffd700, #ff6b35, transparent);
    margin: 12px auto;
    border-radius: 2px;
    animation: slideGlow 2s ease-in-out infinite;
}

@keyframes slideGlow {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* ==================== SUPERHERO CHARACTERS ==================== */
.heroes-container {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 20px;
    height: 220px;
    perspective: 1000px;
    margin: 30px 0;
}

.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: heroFloat 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.5));
}

.hero-1 { animation-delay: 0s; }
.hero-2 { animation-delay: 0.3s; }
.hero-3 { animation-delay: 0.6s; }
.hero-4 { animation-delay: 0.9s; }

@keyframes heroFloat {
    0%, 100% {
        transform: translateY(0px) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.05);
    }
}

.hero-body {
    width: 70px;
    height: 90px;
    border-radius: 35px 35px 20px 20px;
    position: relative;
    box-shadow: 
        0 10px 25px rgba(0, 0, 0, 0.5),
        inset 0 -5px 15px rgba(0, 0, 0, 0.2);
    border: 3px solid rgba(255, 255, 255, 0.3);
}

/* Belt */
.hero-body::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 12px;
    background: rgba(255, 215, 0, 0.8);
    top: 45%;
    left: 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

/* Logo on chest */
.hero-body::after {
    content: 'M';
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Bangers', cursive;
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-head {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #ffd1a3 0%, #ffb380 100%);
    border-radius: 50%;
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
    border: 3px solid rgba(255, 255, 255, 0.4);
}

/* Eyes */
.hero-head::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: #333;
    border-radius: 50%;
    top: 15px;
    left: 10px;
    box-shadow: 12px 0 0 #333;
}

/* Smile */
.hero-head::before {
    content: '';
    position: absolute;
    width: 15px;
    height: 8px;
    border: 2px solid #333;
    border-top: none;
    border-radius: 0 0 15px 15px;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
}

.hero-cape {
    width: 50px;
    height: 60px;
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    clip-path: polygon(50% 0%, 0% 0%, 30% 100%, 70% 100%, 100% 0%);
    z-index: -1;
    opacity: 0.9;
    animation: capeWave 2s ease-in-out infinite;
    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.3));
}

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

/* ==================== LOGIN BUTTONS ==================== */
.login-btn {
    width: 100%;
    padding: 20px 30px;
    border-radius: 50px;
    font-size: 1.3rem;
    font-weight: 700;
    color: white;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 8px 25px rgba(0, 0, 0, 0.4),
        inset 0 -4px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 12px 35px rgba(0, 0, 0, 0.5),
        inset 0 -4px 10px rgba(0, 0, 0, 0.2);
}

.login-btn:active {
    transform: translateY(-1px);
}

.login-btn-blue {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
}

.login-btn-blue:hover {
    box-shadow: 
        0 12px 35px rgba(0, 212, 255, 0.6),
        inset 0 -4px 10px rgba(0, 0, 0, 0.2);
}

.login-btn-orange {
    background: linear-gradient(135deg, #ff6b35 0%, #ff4500 100%);
}

.login-btn-orange:hover {
    box-shadow: 
        0 12px 35px rgba(255, 107, 53, 0.6),
        inset 0 -4px 10px rgba(0, 0, 0, 0.2);
}

.login-btn-purple {
    background: linear-gradient(135deg, #c850c0 0%, #8e24aa 100%);
}

.login-btn-purple:hover {
    box-shadow: 
        0 12px 35px rgba(200, 80, 192, 0.6),
        inset 0 -4px 10px rgba(0, 0, 0, 0.2);
}

/* ==================== LEVEL PATH ==================== */
.level-path {
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.level-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    z-index: 2;
}

.level-node:hover:not(.level-locked) {
    transform: scale(1.15) translateY(-5px);
}

.level-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.5),
        inset 0 -5px 20px rgba(0, 0, 0, 0.3);
    border: 4px solid rgba(255, 255, 255, 0.4);
    position: relative;
    transition: all 0.4s ease;
}

.level-unlocked .level-circle {
    animation: levelPulse 2.5s ease-in-out infinite;
}

@keyframes levelPulse {
    0%, 100% {
        box-shadow: 
            0 10px 30px rgba(0, 0, 0, 0.5),
            inset 0 -5px 20px rgba(0, 0, 0, 0.3),
            0 0 0 0 rgba(255, 255, 255, 0.4);
    }
    50% {
        box-shadow: 
            0 10px 30px rgba(0, 0, 0, 0.5),
            inset 0 -5px 20px rgba(0, 0, 0, 0.3),
            0 0 0 15px rgba(255, 255, 255, 0),
            0 0 30px 20px rgba(255, 255, 255, 0.1);
    }
}

.level-unlocked .level-circle::before {
    content: '';
    position: absolute;
    width: 120%;
    height: 120%;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: ripple 2.5s ease-in-out infinite;
}

@keyframes ripple {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(1.3);
        opacity: 0;
    }
}

.level-icon {
    font-size: 2.8rem;
    filter: drop-shadow(3px 3px 6px rgba(0, 0, 0, 0.4));
    animation: iconBounce 2s ease-in-out infinite;
}

@keyframes iconBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.level-label {
    margin-top: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.6);
    text-align: center;
    max-width: 120px;
}

.level-locked {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(0.7);
}

.level-locked:hover {
    transform: none;
}

.level-locked .level-circle {
    animation: none;
}

.path-line {
    width: 6px;
    height: 50px;
    background: linear-gradient(180deg, 
        rgba(255, 255, 255, 0.5) 0%, 
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0.5) 100%
    );
    border-radius: 3px;
    position: relative;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

/* Dotted line effect */
.path-line::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
}

.path-locked {
    background: linear-gradient(180deg, 
        rgba(100, 100, 100, 0.4) 0%, 
        rgba(100, 100, 100, 0.2) 50%,
        rgba(100, 100, 100, 0.4) 100%
    );
}

.path-locked::before {
    background: rgba(100, 100, 100, 0.3);
}

/* ==================== FILTER TABS ==================== */
.filter-tab {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    border: 2px solid transparent;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.filter-tab:hover {
    background: rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.9);
}

.filter-tab.active {
    background: linear-gradient(135deg, #ff6b35 0%, #ff4500 100%);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 5px 20px rgba(255, 107, 53, 0.5);
}

/* ==================== LEADERBOARD PLAYER CARD ==================== */
.player-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05));
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    padding: 18px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.player-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.player-card:hover::before {
    left: 100%;
}

.player-card:hover {
    transform: translateX(8px);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.player-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #4338ca 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    border: 3px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
    color: white;
}

/* ==================== CARD STYLING ==================== */
.card {
    background: rgba(255, 255, 255, 0.98);
    border-radius: 28px;
    box-shadow: 
        0 25px 70px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    animation: fadeInUp 0.7s ease;
    backdrop-filter: blur(10px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== BUTTON STYLES ==================== */
button {
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    border: none;
    outline: none;
    transition: all 0.3s ease;
    font-weight: 600;
}

.btn-primary, .btn-secondary, .btn-tertiary {
    padding: 1rem 1.5rem;
    border-radius: 50px;
    color: white;
    font-size: 1.125rem;
    font-weight: 700;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::before, .btn-secondary::before, .btn-tertiary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before, .btn-secondary:hover::before, .btn-tertiary:hover::before {
    width: 400px;
    height: 400px;
}

.btn-primary {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.6);
}

.btn-secondary {
    background: linear-gradient(135deg, #ff6b35 0%, #ff4500 100%);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.6);
}

.btn-tertiary {
    background: linear-gradient(135deg, #c850c0 0%, #8e24aa 100%);
}

.btn-tertiary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(200, 80, 192, 0.6);
}

.btn-back {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #e0e0e0 0%, #bdbdbd 100%);
    color: #424242;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-back:hover {
    background: linear-gradient(135deg, #bdbdbd 0%, #9e9e9e 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-skip {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #ffeb3b 0%, #fbc02d 100%);
    color: #f57f17;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    white-space: nowrap;
}

.btn-skip:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(251, 192, 45, 0.5);
}

/* ==================== OPTION BUTTONS ==================== */
.option-btn {
    transition: all 0.3s ease;
    border: 3px solid transparent;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.option-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.2), transparent);
    transition: left 0.5s;
}

.option-btn:hover::before {
    left: 100%;
}

.option-btn:hover {
    transform: translateX(8px);
    border-color: #00d4ff;
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.4);
}

.option-btn.selected {
    border-color: #00d4ff;
    background: linear-gradient(135deg, #e0f7ff 0%, #b3e5fc 100%);
    transform: translateX(8px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.4);
}

.option-btn.correct {
    border-color: #4caf50;
    background: linear-gradient(135deg, #c8e6c9 0%, #a5d6a7 100%);
    animation: correctPulse 0.7s ease;
}

.option-btn.incorrect {
    border-color: #f44336;
    background: linear-gradient(135deg, #ffcdd2 0%, #ef9a9a 100%);
    animation: incorrectShake 0.7s ease;
}

@keyframes correctPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

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

/* ==================== INPUT STYLING ==================== */
input[type="text"] {
    border: 3px solid #e0e0e0;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 500;
}

input[type="text"]:focus {
    outline: none;
    border-color: #00d4ff;
    box-shadow: 0 0 0 5px rgba(0, 212, 255, 0.2);
    transform: scale(1.02);
}

/* ==================== PROGRESS BAR ==================== */
.progress-bar {
    background: linear-gradient(90deg, #00d4ff 0%, #c850c0 50%, #ff6b35 100%);
    background-size: 200% 100%;
    animation: progressGradient 3s linear infinite;
    box-shadow: 0 3px 15px rgba(0, 212, 255, 0.6);
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 50%, transparent 100%);
    animation: shine 2s ease-in-out infinite;
}

@keyframes progressGradient {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

@keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ==================== STAT CARDS ==================== */
.stat-card {
    padding: 1.8rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

/* ==================== SETTINGS TOGGLE SWITCH ==================== */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.4s;
    border-radius: 34px;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.2);
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

input:checked + .slider {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.setting-item {
    padding: 1.2rem;
    background: linear-gradient(135deg, #f9f9f9, #f0f0f0);
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.setting-item:hover {
    background: linear-gradient(135deg, #f0f0f0, #e8e8e8);
    border-color: #00d4ff;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* ==================== ACHIEVEMENT BADGES ==================== */
.achievement {
    padding: 1.2rem;
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    border-radius: 16px;
    text-align: center;
    transition: all 0.4s ease;
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.achievement::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.5) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.achievement:hover::before {
    transform: translateX(100%);
}

.achievement.unlocked {
    border-color: #ffa726;
    box-shadow: 0 5px 20px rgba(255, 167, 38, 0.4);
    animation: badgeGlow 2s ease-in-out infinite;
}

@keyframes badgeGlow {
    0%, 100% {
        box-shadow: 0 5px 20px rgba(255, 167, 38, 0.4);
    }
    50% {
        box-shadow: 0 5px 30px rgba(255, 167, 38, 0.6);
    }
}

.achievement.locked {
    opacity: 0.5;
    filter: grayscale(1);
}

.achievement:hover:not(.locked) {
    transform: scale(1.1) rotate(5deg);
}

/* ==================== FEEDBACK ANIMATIONS ==================== */
#feedback {
    animation: feedbackSlide 0.5s ease;
    position: relative;
}

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

#explanation {
    animation: fadeIn 0.5s ease;
    border-left: 4px solid #00d4ff;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==================== RESPONSIVE DESIGN ==================== */

/* Tablets (768px - 1024px) */
@media (max-width: 1024px) {
    .phone-frame {
        max-width: 420px;
    }
    
    .game-title {
        font-size: 2.5rem;
    }
    
    .heroes-container {
        height: 200px;
        gap: 15px;
    }
    
    .hero-body {
        width: 65px;
        height: 85px;
    }
    
    .hero-head {
        width: 38px;
        height: 38px;
    }
    
    .login-btn {
        font-size: 1.2rem;
        padding: 18px 28px;
    }
    
    .level-circle {
        width: 95px;
        height: 95px;
    }
    
    .level-icon {
        font-size: 2.5rem;
    }
}

/* Mobile Landscape & Small Tablets (600px - 768px) */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .phone-frame {
        max-width: 100%;
        padding: 15px;
        border-radius: 35px;
    }
    
    .phone-frame::before {
        width: 90px;
        height: 26px;
    }
    
    .phone-content {
        padding: 45px 18px 25px;
        min-height: 680px;
    }
    
    .game-title {
        font-size: 2.2rem;
        letter-spacing: 2px;
    }
    
    .title-underline {
        width: 120px;
    }
    
    .heroes-container {
        height: 180px;
        gap: 12px;
    }
    
    .hero-body {
        width: 60px;
        height: 80px;
    }
    
    .hero-head {
        width: 35px;
        height: 35px;
        top: -22px;
    }
    
    .hero-head::after {
        width: 7px;
        height: 7px;
        top: 13px;
        left: 9px;
        box-shadow: 10px 0 0 #333;
    }
    
    .hero-cape {
        width: 45px;
        height: 55px;
    }
    
    .login-btn {
        font-size: 1.1rem;
        padding: 16px 25px;
    }
    
    .level-circle {
        width: 90px;
        height: 90px;
    }
    
    .level-icon {
        font-size: 2.3rem;
    }
    
    .level-label {
        font-size: 0.75rem;
    }
    
    .path-line {
        height: 45px;
    }
    
    .player-card {
        padding: 15px;
        border-radius: 20px;
    }
    
    .player-avatar {
        width: 55px;
        height: 55px;
        font-size: 1.6rem;
    }
    
    .card {
        border-radius: 24px;
    }
    
    .btn-primary, .btn-secondary, .btn-tertiary {
        font-size: 1rem;
        padding: 0.875rem 1.25rem;
    }
    
    .stat-card {
        padding: 1.5rem;
    }
}

/* Mobile Portrait (480px - 600px) */
@media (max-width: 600px) {
    .phone-frame {
        padding: 12px;
        border-radius: 30px;
    }
    
    .phone-content {
        padding: 40px 15px 20px;
        min-height: 640px;
    }
    
    .game-title {
        font-size: 2rem;
        letter-spacing: 1.5px;
    }
    
    .title-underline {
        width: 100px;
        height: 3px;
    }
    
    .heroes-container {
        height: 160px;
        gap: 10px;
        margin: 20px 0;
    }
    
    .hero-body {
        width: 55px;
        height: 75px;
        border-radius: 28px 28px 18px 18px;
    }
    
    .hero-body::before {
        height: 10px;
    }
    
    .hero-body::after {
        font-size: 1.3rem;
    }
    
    .hero-head {
        width: 32px;
        height: 32px;
        top: -20px;
    }
    
    .hero-head::after {
        width: 6px;
        height: 6px;
        top: 12px;
        left: 8px;
        box-shadow: 9px 0 0 #333;
    }
    
    .hero-cape {
        width: 42px;
        height: 50px;
    }
    
    .login-btn {
        font-size: 1rem;
        padding: 15px 22px;
        letter-spacing: 1px;
    }
    
    .level-path {
        padding: 25px 15px;
        gap: 18px;
    }
    
    .level-circle {
        width: 85px;
        height: 85px;
        border: 3px solid rgba(255, 255, 255, 0.4);
    }
    
    .level-icon {
        font-size: 2.2rem;
    }
    
    .level-label {
        font-size: 0.7rem;
        margin-top: 10px;
        max-width: 100px;
    }
    
    .path-line {
        width: 5px;
        height: 40px;
    }
    
    .filter-tab {
        padding: 10px 18px;
        font-size: 0.85rem;
    }
    
    .player-card {
        padding: 12px;
        border-radius: 18px;
    }
    
    .player-avatar {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .card {
        padding: 1.25rem !important;
        border-radius: 20px;
    }
    
    .btn-primary, .btn-secondary, .btn-tertiary {
        font-size: 0.95rem;
        padding: 0.8rem 1.1rem;
    }
    
    .btn-skip {
        padding: 0.65rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .option-btn {
        padding: 0.875rem 1rem !important;
        font-size: 0.95rem;
        margin-bottom: 0.625rem !important;
    }
    
    #questionText {
        font-size: 1.125rem;
    }
    
    .stat-card {
        padding: 1.25rem;
    }
}

/* Small Mobile (320px - 480px) */
@media (max-width: 480px) {
    .phone-frame {
        padding: 10px;
        border-radius: 25px;
    }
    
    .phone-frame::before {
        width: 80px;
        height: 24px;
        top: 8px;
    }
    
    .phone-content {
        padding: 35px 12px 18px;
        min-height: 600px;
    }
    
    .game-title {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }
    
    .title-underline {
        width: 80px;
        height: 3px;
    }
    
    .heroes-container {
        height: 140px;
        gap: 8px;
        margin: 15px 0;
    }
    
    .hero-body {
        width: 50px;
        height: 70px;
        border-radius: 25px 25px 15px 15px;
    }
    
    .hero-body::before {
        height: 8px;
    }
    
    .hero-body::after {
        font-size: 1.2rem;
    }
    
    .hero-head {
        width: 28px;
        height: 28px;
        top: -18px;
    }
    
    .hero-head::after {
        width: 5px;
        height: 5px;
        top: 11px;
        left: 7px;
        box-shadow: 8px 0 0 #333;
    }
    
    .hero-head::before {
        width: 12px;
        height: 6px;
        bottom: 6px;
    }
    
    .hero-cape {
        width: 38px;
        height: 48px;
    }
    
    .login-btn {
        font-size: 0.95rem;
        padding: 14px 20px;
        letter-spacing: 0.5px;
    }
    
    .level-path {
        padding: 20px 10px;
        gap: 15px;
    }
    
    .level-circle {
        width: 75px;
        height: 75px;
    }
    
    .level-icon {
        font-size: 2rem;
    }
    
    .level-label {
        font-size: 0.65rem;
        margin-top: 8px;
        letter-spacing: 0.8px;
        max-width: 90px;
    }
    
    .path-line {
        width: 4px;
        height: 35px;
    }
    
    .path-line::before {
        width: 12px;
        height: 12px;
    }
    
    .filter-tab {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
    
    .player-card {
        padding: 10px;
        border-radius: 16px;
    }
    
    .player-avatar {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    .card {
        padding: 1rem !important;
        border-radius: 18px;
    }
    
    .btn-primary, .btn-secondary, .btn-tertiary {
        font-size: 0.9rem;
        padding: 0.75rem 1rem;
    }
    
    .btn-skip {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
    
    .option-btn {
        padding: 0.75rem 0.875rem !important;
        font-size: 0.9rem;
        margin-bottom: 0.5rem !important;
    }
    
    #questionText {
        font-size: 1rem;
    }
    
    #questionType {
        font-size: 0.7rem;
        padding: 0.4rem 0.75rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .achievement {
        padding: 1rem;
    }
    
    .setting-item {
        padding: 1rem;
    }
}

/* Extra Small Mobile (< 320px) */
@media (max-width: 320px) {
    .phone-frame {
        padding: 8px;
        border-radius: 20px;
    }
    
    .phone-content {
        padding: 32px 10px 15px;
        min-height: 560px;
    }
    
    .game-title {
        font-size: 1.5rem;
    }
    
    .heroes-container {
        height: 120px;
        gap: 6px;
    }
    
    .hero-body {
        width: 45px;
        height: 65px;
    }
    
    .hero-head {
        width: 25px;
        height: 25px;
        top: -16px;
    }
    
    .hero-cape {
        width: 35px;
        height: 45px;
    }
    
    .login-btn {
        font-size: 0.9rem;
        padding: 12px 18px;
    }
    
    .level-circle {
        width: 70px;
        height: 70px;
    }
    
    .level-icon {
        font-size: 1.8rem;
    }
    
    .level-label {
        font-size: 0.6rem;
    }
    
    .player-avatar {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* ==================== DESKTOP LARGE SCREENS ==================== */
@media (min-width: 1440px) {
    .phone-frame {
        max-width: 480px;
    }
    
    .phone-content {
        min-height: 800px;
        padding: 55px 25px 35px;
    }
    
    .game-title {
        font-size: 3rem;
    }
    
    .heroes-container {
        height: 240px;
        gap: 25px;
    }
    
    .hero-body {
        width: 75px;
        height: 95px;
    }
    
    .hero-head {
        width: 42px;
        height: 42px;
        top: -26px;
    }
    
    .hero-cape {
        width: 55px;
        height: 65px;
    }
    
    .login-btn {
        font-size: 1.4rem;
        padding: 22px 35px;
    }
    
    .level-circle {
        width: 110px;
        height: 110px;
    }
    
    .level-icon {
        font-size: 3rem;
    }
    
    .level-label {
        font-size: 0.85rem;
    }
}

/* ==================== LANDSCAPE ORIENTATION ==================== */
@media (max-height: 600px) and (orientation: landscape) {
    .phone-content {
        min-height: 500px;
    }
    
    .heroes-container {
        height: 120px;
    }
    
    .hero-body {
        width: 50px;
        height: 65px;
    }
    
    .login-btn {
        padding: 12px 20px;
    }
}

/* ==================== PRINT STYLES ==================== */
@media print {
    .stars, 
    button:not(.option-btn),
    .phone-frame::before,
    .phone-frame::after {
        display: none;
    }
    
    body {
        background: white;
    }
    
    .phone-frame {
        border: 1px solid #ddd;
        box-shadow: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== FOCUS STYLES FOR KEYBOARD NAVIGATION ==================== */
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 3px solid #00d4ff;
    outline-offset: 3px;
}

/* ==================== LOADING SPINNER ==================== */
.loading {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* ==================== TOOLTIP ==================== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 200px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 8px;
    padding: 10px;
    position: absolute;
    z-index: 1000;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.875rem;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* ==================== CUSTOM SCROLLBAR ==================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #00d4ff, #c850c0);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #c850c0, #ff6b35);
}

/* ==================== SELECTION COLOR ==================== */
::selection {
    background: rgba(0, 212, 255, 0.3);
    color: inherit;
}

::-moz-selection {
    background: rgba(0, 212, 255, 0.3);
    color: inherit;
}