:root {
    --bg-dark: #050505;
    --bg-panel: rgba(20, 20, 20, 0.6);
    --primary: #6366f1;
    --neon-blue: #00f3ff;
    --neon-purple: #bc13fe;
    --neon-green: #0aff68;
    --neon-red: #ff0055;
    --neon-orange: #ff9f1c;
    --warning: #facc15;
    --border: rgba(255, 255, 255, 0.1);
    --font-ui: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --glass: blur(20px);
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--bg-dark);
    color: #fff;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

.background-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(188, 19, 254, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    perspective: 1000px;
    transform-style: preserve-3d;
}

.background-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.15), transparent 60%);
    z-index: -1;
    pointer-events: none;
    animation: pulseGlow 10s infinite alternate;
}

@keyframes pulseGlow {
    0% { opacity: 0.5; }
    100% { opacity: 1; }
}

.game-container {
    width: 100%;
    max-width: 1100px;
    padding: 2rem;
    position: relative;
    z-index: 10;
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.game-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
    box-shadow: 0 0 10px var(--neon-blue);
}

.back-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 100px;
    border: 1px solid transparent;
}

.back-button:hover {
    color: var(--neon-blue);
    border-color: rgba(0, 243, 255, 0.3);
    background: rgba(0, 243, 255, 0.05);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.2);
}

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

.game-title {
    font-family: var(--font-mono);
    font-size: 2.2rem;
    letter-spacing: -0.05em;
    display: flex;
    align-items: center;
    gap: 1rem;
    text-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

.badge {
    font-size: 0.8rem;
    background: linear-gradient(135deg, var(--neon-purple), var(--primary));
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    letter-spacing: 0.1em;
    box-shadow: 0 0 15px rgba(188, 19, 254, 0.4);
    font-weight: 800;
    position: relative;
    overflow: hidden;
}

.badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shine 3s infinite;
}

@keyframes shine {
    0%, 80% { left: -100%; }
    100% { left: 100%; }
}

.game-subtitle {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    letter-spacing: 1px;
}

.control-button {
    background: rgba(255, 255, 255, 0.05);
    border: 1px soli 1rem;
    border-radius: 12px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
    color: #474646;
}

.control-button svg {
    width: 20px;
    height: 20px
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.control-button:hover {
    border-color: var(--neon-blue);
    color: var(--neon-blue);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.15);
    transform: translateY(-2px);
}

.game-board {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.left-panel {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.status-section {
    background: var(--bg-panel);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    backdrop-filter: var(--glass);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 1rem;
}

.status-label {
    font-size: 0.8rem;
    color: var(--neon-blue);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}

.status-number {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    color: #fff;
}

.attempts-bar-container {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    overflow: hidden;
    position: relative;
}

.attempts-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-blue));
    border-radius: 100px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1), background 0.5s;
    box-shadow: 0 0 15px var(--neon-green);
    position: relative;
}

.attempts-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    opacity: 0.3;
}

.input-section {
    background: var(--bg-panel);
    padding: 3rem;
    border-radius: 24px;
    border: 1px solid var(--border);
    backdrop-filter: var(--glass);
    position: relative;
    overflow: hidden;
}

.input-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--neon-purple), var(--neon-blue));
    opacity: 0.5;
}

.input-display {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.digit-input {
    width: 70px;
    height: 80px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: #fff;
    font-family: var(--font-mono);
    font-size: 2.5rem;
    text-align: center;
    transition: all 0.3s;
    caret-color: var(--neon-blue);
}

.digit-input:focus {
    outline: none;
    border-color: var(--neon-blue);
    box-shadow: 0 0 25px rgba(0, 243, 255, 0.2), inset 0 0 10px rgba(0, 243, 255, 0.1);
    transform: translateY(-2px);
    background: rgba(0, 243, 255, 0.05);
}

.submit-btn {
    width: 100%;
    padding: 1.25rem;
    background: linear-gradient(135deg, var(--primary), var(--neon-purple));
    border: none;
    border-radius: 12px;
    color: white;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.2em;
    cursor: pointer;
    transition: all 0.3s;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(188, 19, 254, 0.4);
    filter: brightness(1.1);
}

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

.feedback-area {
    min-height: 40px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 0.5rem;
    border-radius: 8px;
    text-shadow: 0 0 10px rgba(0,0,0,0.3);
}

.feedback-area.error { color: var(--neon-red); text-shadow: 0 0 10px rgba(255, 0, 85, 0.3); }

.legend-panel {
    display: flex;
    gap: 2rem;
    justify-content: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: 100px;
    border: 1px solid var(--border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    position: relative;
}

.indicator.correct { background: var(--neon-green); box-shadow: 0 0 10px var(--neon-green); }
.indicator.existing { background: yellow; box-shadow: 0 0 10px yellow; }
.indicator.wrong { background: rgba(255,255,255,0.2); }

.right-panel {
    background: var(--bg-panel);
    border-radius: 24px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 600px;
    backdrop-filter: var(--glass);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}

.history-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    background: rgba(0,0,0,0.2);
}

.log-count {
    color: var(--neon-blue);
    font-weight: bold;
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.history-list::-webkit-scrollbar {
    width: 6px;
}
.history-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
}

.history-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
    border-color: rgba(255, 255, 255, 0.1);
}

.history-item.win {
    border-color: var(--neon-green);
    background: rgba(10, 255, 104, 0.1);
    box-shadow: 0 0 20px rgba(10, 255, 104, 0.1);
}

.attempt-number {
    font-family: var(--font-mono);
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.8rem;
}

.attempt-digits {
    display: flex;
    gap: 0.75rem;
}

.mini-digit {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.mini-digit.correct { 
    border-color: var(--neon-green); 
    color: var(--neon-green); 
    box-shadow: 0 0 10px rgba(10, 255, 104, 0.2); 
}
.mini-digit.exists { 
    border-color: yellow; 
    color: yellow; 
    box-shadow: 0 0 10px rgba(255, 255, 0, 0.2); 
}
.mini-digit.wrong { opacity: 0.3; }

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

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

.modal-card {
    background: #0f0f11;
    border: 1px solid var(--neon-blue);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    transform: translateY(20px);
    transition: transform 0.3s;
    box-shadow: 0 0 50px rgba(0, 243, 255, 0.2);
}

.modal-overlay.show .modal-card {
    transform: translateY(0);
}

.modal-icon {
    font-size: 5rem;
    margin-bottom: 2rem;
    animation: bounce 2s infinite;
}

.modal-title {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.modal-message {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 2rem;
}

.result-breakdown {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
}

.modal-action-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--neon-blue), var(--primary));
    color: #000;
    border: none;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.modal-action-btn:hover {
    opacity: 0.9;
}

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

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

@media (max-width: 768px) {
    .game-board {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .right-panel {
        height: 350px;
    }
    .digit-input {
        width: 50px;
        height: 60px;
        font-size: 1.5rem;
    }
}