:root {
    --primary-color: #8B0000;
    --primary-hover: #A52A2A;
    --bg-color: #1a252c;
    --app-bg: #f4e8c1;
    --text-color: #3e2723;
    --btn-bg: #e8d5a5;
    --btn-hover: #d7c08a;
    --btn-border: #5c3a21;
    --correct-color: #2e8b57;
    --wrong-color: #8B0000;
    --gold-color: #DAA520;
}

body {
    font-family: 'Sawarabi Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
    background: radial-gradient(circle at center, #2c3e50 0%, #0a0f14 100%);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

#app {
    width: 100%;
    max-width: 480px;
    background-color: var(--app-bg);
    min-height: 100vh;
    box-shadow: 0 0 30px rgba(0,0,0,0.8);
    border: 4px solid var(--btn-border);
    outline: 2px solid #8b5a2b;
    outline-offset: -8px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

#app::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: repeating-linear-gradient(45deg, rgba(92,58,33,0.02) 0px, rgba(92,58,33,0.02) 2px, transparent 2px, transparent 4px);
    pointer-events: none;
    z-index: 0;
}

header {
    background: linear-gradient(180deg, #2c1e16 0%, #1a110c 100%);
    color: var(--gold-color);
    border-bottom: 4px solid var(--primary-color);
    padding: 20px 15px;
    text-align: center;
    font-weight: bold;
    font-size: 1.3rem;
    position: relative;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px #000;
    z-index: 1;
}

.back-btn {
    position: absolute;
    left: 15px;
    top: 18px;
    cursor: pointer;
    display: none;
    background: none;
    border: none;
    color: var(--gold-color);
    font-size: 1rem;
    text-shadow: 1px 1px 2px #000;
    box-shadow: none;
}
.back-btn:hover {
    transform: scale(1.1);
}

.screen {
    display: none;
    flex: 1;
    padding: 25px 20px;
    flex-direction: column;
    z-index: 1;
}

.screen.active {
    display: flex;
}

.user-info {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.4);
    border: 2px dashed var(--btn-border);
    border-radius: 4px;
}
.user-icon {
    width: 60px;
    height: 60px;
    background-color: var(--btn-bg);
    border: 2px solid var(--btn-border);
    border-radius: 50%;
    margin-right: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    box-shadow: inset 0 0 10px rgba(92,58,33,0.3);
}
.stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 30px;
}
.stat-box {
    background-color: rgba(255, 255, 255, 0.4);
    padding: 15px 10px;
    border: 1px solid var(--btn-border);
    border-radius: 4px;
    text-align: center;
    box-shadow: inset 0 0 10px rgba(92,58,33,0.1);
}
.stat-value {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 5px;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

button {
    font-family: 'Sawarabi Mincho', 'Hiragino Mincho ProN', serif;
    padding: 15px;
    font-size: 1.1rem;
    border: 2px solid var(--btn-border);
    background-color: var(--btn-bg);
    color: var(--text-color);
    border-radius: 4px;
    box-shadow: 3px 3px 0px rgba(92, 58, 33, 0.4);
    cursor: pointer;
    font-weight: bold;
    transition: all 0.1s ease;
    position: relative;
}
button:hover {
    background-color: var(--btn-hover);
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0px rgba(92, 58, 33, 0.4);
}
button:active {
    transform: translate(3px, 3px);
    box-shadow: 0px 0px 0px rgba(92, 58, 33, 0.4);
}

button.primary {
    background: linear-gradient(to bottom, var(--primary-color), #600000);
    color: var(--gold-color);
    border-color: #3e2723;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px #000;
}
button.primary:hover {
    background: linear-gradient(to bottom, var(--primary-hover), #800000);
}

button:disabled {
    background: #d5d8dc !important;
    border-color: #a6acaf !important;
    color: #7f8c8d !important;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
    text-shadow: none;
}

.category {
    text-align: center;
    color: var(--btn-border);
    margin-bottom: 15px;
    font-size: 1rem;
    font-weight: bold;
    border-bottom: 2px dotted #8b5a2b;
    padding-bottom: 5px;
}
.question-text {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 25px;
    min-height: 80px;
    font-weight: bold;
}
.timer-bar {
    width: 100%;
    height: 12px;
    background-color: var(--btn-border);
    border: 2px solid #3e2723;
    border-radius: 2px;
    margin-bottom: 25px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}
.timer-fill {
    height: 100%;
    background-color: var(--gold-color);
    width: 100%;
    transition: width 0.1s linear;
    box-shadow: inset 0 -3px 0 rgba(0,0,0,0.2);
}
.choices {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.choice-btn {
    text-align: left;
    padding: 15px 20px;
    background-color: rgba(255,255,255,0.6);
}
.choice-btn.correct {
    background-color: var(--correct-color) !important;
    border-color: #1b5e20 !important;
    color: #fff !important;
    text-shadow: 1px 1px 1px #000;
}
.choice-btn.wrong {
    background-color: var(--wrong-color) !important;
    border-color: #4a0000 !important;
    color: #fff !important;
    text-shadow: 1px 1px 1px #000;
}

.coming-soon {
    text-align: center;
    color: #8b5a2b;
    margin-top: 50px;
    font-weight: bold;
}

input[type="text"], select {
    font-family: 'Sawarabi Mincho', serif;
    background-color: rgba(255,255,255,0.6);
    border: 2px solid var(--btn-border);
    color: var(--text-color);
    font-weight: bold;
}
input[type="text"]:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: #fff;
}

#loading {
    position: absolute;
    top:0; left:0; width:100%; height:100%;
    background: var(--app-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    font-weight: bold;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-shadow: 1px 1px 0px rgba(255,255,255,0.5);
}