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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #deb887ce;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    max-width: 700px;
    width: 100%;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.3rem;
    opacity: 0.9;
}

.game-container {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    margin-bottom: 20px;
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e5e7eb;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.label {
    font-weight: 600;
    color: #374151;
    font-size: 1.1rem;
}

.value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ea580c;
}

.control-button {
    background: linear-gradient(135deg, #fb923c 0%, #f97316 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.control-button:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(251, 146, 60, 0.4);
}

.control-button:active {
    transform: scale(0.98);
}

.current-guess-section {
    margin-bottom: 25px;
}

.current-guess-section h3 {
    color: #1f2937;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.digit-input-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.digit-box {
    position: relative;
    width: 80px;
    height: 130px;
    background: linear-gradient(135deg, #f9fafb 0%, #e5e7eb 100%);
    border: 3px solid #d1d5db;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
    padding-top: 15px;
    padding-bottom: 15px;
}

.digit-box:hover {
    border-color: #fb923c;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(251, 146, 60, 0.3);
}

.digit-box:focus {
    border-color: #fb923c;
    box-shadow: 0 0 0 3px rgba(251, 146, 60, 0.2);
}

.digit-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1f2937;
    user-select: none;
}

.digit-controls {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: 5px;
}

.digit-up,
.digit-down {
    background: #fb923c;
    color: white;
    border: none;
    width: 30px;
    height: 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.7rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.digit-up:hover,
.digit-down:hover {
    background: #f97316;
    transform: scale(1.1);
}

.digit-up:active,
.digit-down:active {
    transform: scale(0.95);
}

.submit-button {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    padding: 12px 40px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: block;
    margin: 0 auto;
}

.submit-button:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.4);
}

.submit-button:active {
    transform: scale(0.98);
}

.feedback-legend {
    background: #fef3c7;
    border: 2px solid #fbbf24;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 25px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: #78350f;
    font-weight: 500;
}

.bull-icon,
.cow-icon {
    font-size: 1.5rem;
}

.attempts-section {
    margin-bottom: 25px;
}

.attempts-section h3 {
    color: #1f2937;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.attempts-history {
    max-height: 350px;
    overflow-y: auto;
    background: #f9fafb;
    border-radius: 10px;
    padding: 15px;
}

.empty-state {
    color: #9ca3af;
    text-align: center;
    font-style: italic;
}

.attempt-item {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
}

.attempt-item.winning {
    border-color: #10b981;
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
}

.attempt-guess {
    display: flex;
    gap: 8px;
}

.attempt-digit {
    width: 40px;
    height: 50px;
    background: linear-gradient(135deg, #e5e7eb 0%, #d1d5db 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
}

.attempt-feedback {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 120px;
}

.feedback-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
}

.feedback-bulls {
    color: #dc2626;
}

.feedback-cows {
    color: #f59e0b;
}

.win-message {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: 15px;
    color: white;
    margin-top: 20px;
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

.win-message.hidden {
    display: none;
}

.win-message h2 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.win-message p {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.attempts-count {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.help-button-container {
    position: absolute;
    top: 20px;
    right: 20px;
}

.help-button {
    display: inline-block;
    color: white;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: none;
    padding: 12px 24px;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.help-button:hover {
    background: rgba(255, 255, 255, 0.3);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: 20px;
    padding: 40px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    z-index: 1001;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: #6b7280;
    cursor: pointer;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: #f3f4f6;
    color: #1f2937;
}

.modal-content h2 {
    color: #1f2937;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.modal-content p {
    color: #4b5563;
    line-height: 1.6;
    margin-bottom: 15px;
}

.modal-content ul {
    margin-left: 20px;
    margin-top: 10px;
    margin-bottom: 15px;
    color: #4b5563;
    line-height: 1.8;
}

.modal-content strong {
    color: #1f2937;
}

.instructions-content .note {
    font-size: 0.9rem;
    font-style: italic;
    color: #6b7280;
    margin-top: 15px;
}

.back-button-container {
    position: absolute;
    top: 20px;
    left: 20px;
}

.back-button {
    display: inline-block;
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    font-weight: 600;
    transition: all 0.2s ease;
}

.back-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(-5px);
}

@media (max-width: 768px) {
    header {
        margin-bottom: 60px;
    }

    header h1 {
        display: none;
    }

    .subtitle {
        display: none;
    }

    .game-container {
        padding: 20px;
    }

    .digit-input {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .digit-box {
        width: 60px;
        height: 100px;
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .digit-value {
        font-size: 1.8rem;
    }

    .digit-controls {
        margin-top: 3px;
    }

    .digit-up,
    .digit-down {
        font-size: 0.7rem;
        padding: 3px 8px;
    }

    .win-message h2 {
        font-size: 1.5rem;
    }

    .attempt-digit {
        width: 30px;
        height: 38px;
        font-size: 1rem;
    }

    .feedback-legend {
        flex-direction: column;
        gap: 10px;
        padding: 10px;
    }

    .legend-item {
        font-size: 0.8rem;
    }

    .bull-icon,
    .cow-icon {
        font-size: 1.2rem;
    }

    /* Mobile-friendly: icon-only buttons */
    .back-button {
        font-size: 0;
        padding: 8px;
        min-width: 36px;
        min-height: 36px;
    }

    .back-button::before {
        content: '←';
        font-size: 1.2rem;
    }

    .help-button {
        font-size: 0;
        padding: 8px;
        min-width: 36px;
        min-height: 36px;
    }

    .help-button::before {
        content: '📖';
        font-size: 1.2rem;
    }
}