:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --cooldown-bg-color: #2a2a2a;
    --primary-color: #bb86fc;
    --on-surface-color: #e0e0e0;
    --ready-color: #66ff66;
    --cooldown-color: #cf6679;
    --disabled-color: #444;
    --duration-color: #82aaff;
    --active-color: #333; /* 터치 피드백 색상 */
}

.dark-mode, .dark-mode body {
    background-color: var(--bg-color) !important;
    color: var(--on-surface-color) !important;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    height: calc(100% - 60px);
    padding-top: 60px;
}

header {
    padding: 10px;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--disabled-color);
}

.timers-container {
    display: flex;
    justify-content: space-around;
    gap: 5px;
}

.timer-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.timer-display {
    font-size: 1.2rem;
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    background-color: var(--surface-color);
    padding: 5px 10px;
    border-radius: 5px;
    min-width: 100px;
    text-align: center;
}

.timer-btn {
    width: 100%;
    padding: 8px;
    font-size: 0.9rem;
    border: none;
    border-radius: 5px;
    background-color: var(--primary-color);
    color: var(--bg-color);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.15s;
}

.timer-btn:active {
    background-color: var(--active-color);
}

.timer-btn.running {
    background-color: var(--cooldown-color);
}

.skill-grid {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    padding: 15px;
    overflow-y: auto;
}

.skill-card {
    position: relative;
    background-color: var(--surface-color);
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    aspect-ratio: 1 / 1;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    overflow: hidden;
}

.skill-card.on-cooldown {
    background-color: var(--cooldown-bg-color);
    opacity: 0.6;
    box-shadow: none;
}

.skill-card.ready {
    background-color: var(--surface-color);
    box-shadow: 0 0 15px var(--ready-color), 0 0 8px var(--ready-color) inset;
    transform: scale(1.03);
    animation: pulse-ready 1.5s infinite ease-in-out;
}

@keyframes pulse-ready {
    0% { transform: scale(1.03); }
    50% { transform: scale(1.06); }
    100% { transform: scale(1.03); }
}

.progress-ring {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    transform: rotate(-90deg);
}

.progress-ring__circle {
    transition: stroke-dashoffset 0.1s linear, stroke 0.2s;
    stroke-width: 10px;
    fill: transparent;
}

.progress-ring__background {
    stroke: var(--disabled-color);
}

.progress-ring__progress {
    stroke: var(--primary-color);
    stroke-linecap: round;
    filter: drop-shadow(0 0 5px var(--primary-color));
}

.skill-card.on-cooldown .progress-ring__progress {
    stroke: var(--cooldown-color);
    filter: drop-shadow(0 0 5px var(--cooldown-color));
}

.skill-info {
    text-align: center;
    z-index: 1;
    padding: 5px;
}

.skill-name {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.skill-timer {
    font-size: 2.2rem;
    font-weight: 900;
    font-family: 'Courier New', Courier, monospace;
}

.skill-timer.on-cooldown { color: var(--cooldown-color); }
.skill-timer.ready { color: var(--ready-color); }

.sub-timers {
    position: absolute;
    bottom: 8px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    font-size: 0.9rem;
    font-weight: bold;
}

.duration-timer { color: var(--duration-color); }
.elapsed-timer { color: var(--on-surface-color); }

/* Mobile Responsive */
@media (max-width: 380px) {
    .timer-display {
        font-size: 1rem;
        min-width: 85px;
        padding: 5px;
    }
    .timer-btn {
        font-size: 0.8rem;
    }
    .skill-name {
        font-size: 1rem;
    }
    .skill-timer {
        font-size: 2rem;
    }
}