/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #0a0a0f;
    --bg-card: #14141f;
    --bg-row: #1a1a2e;
    --bg-unranked: #12121c;
    --text-primary: #e0e0e0;
    --text-secondary: #888;
    --neon-pink: #ff2d7b;
    --neon-cyan: #00f0ff;
    --neon-purple: #a855f7;
    --tier-s: #ff1744;
    --tier-a: #ff9100;
    --tier-b: #ffea00;
    --tier-c: #00e676;
    --tier-d: #2979ff;
    --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.3);
    --radius: 8px;
    --thumb-size: 80px;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

/* ===== HEADER ===== */
.header {
    text-align: center;
    padding: 24px 16px 12px;
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.15) 0%, transparent 100%);
}

.title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.title-jp {
    font-size: 1.6rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-en {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--neon-cyan);
    letter-spacing: 3px;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.subtitle {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ===== MAIN ===== */
.main {
    max-width: 800px;
    margin: 0 auto;
    padding: 16px 12px;
}

/* ===== TIER ROWS ===== */
.tier-container {
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.tier-row {
    display: flex;
    min-height: calc(var(--thumb-size) + 16px);
    background: var(--bg-row);
    transition: background 0.2s;
}

.tier-row.drag-over {
    background: rgba(255, 255, 255, 0.08);
}

.tier-label {
    width: 60px;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    font-weight: 900;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.tier-s { background: var(--tier-s); }
.tier-a { background: var(--tier-a); }
.tier-b { background: var(--tier-b); color: #333; text-shadow: none; }
.tier-c { background: var(--tier-c); color: #333; text-shadow: none; }
.tier-d { background: var(--tier-d); }

.tier-items {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding: 8px;
    min-height: calc(var(--thumb-size) + 16px);
}

/* ===== IMAGE ITEMS ===== */
.tier-item {
    width: var(--thumb-size);
    height: var(--thumb-size);
    border-radius: 6px;
    overflow: hidden;
    cursor: grab;
    position: relative;
    border: 2px solid rgba(255, 255, 255, 0.15);
    transition: transform 0.15s, border-color 0.2s, box-shadow 0.2s;
    flex-shrink: 0;
}

.tier-item:hover {
    transform: scale(1.08);
    border-color: var(--neon-cyan);
    box-shadow: var(--shadow-neon);
    z-index: 10;
}

.tier-item:active,
.tier-item.dragging {
    cursor: grabbing;
    opacity: 0.5;
    transform: scale(0.95);
}

.tier-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    display: block;
}

/* ===== UNRANKED POOL ===== */
.unranked-section {
    margin-top: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
    overflow: hidden;
}

.unranked-header {
    background: rgba(168, 85, 247, 0.15);
    padding: 8px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.unranked-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--neon-purple);
}

.unranked-pool {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
    min-height: calc(var(--thumb-size) + 24px);
    background: var(--bg-unranked);
    justify-content: center;
    transition: background 0.2s;
}

.unranked-pool.drag-over {
    background: rgba(168, 85, 247, 0.12);
}

/* ===== BUTTONS ===== */
.actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 50px;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: scale(0.97);
}

.btn-icon {
    font-size: 1.1rem;
}

.btn-reset {
    background: var(--bg-row);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-reset:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.btn-share {
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
    color: #fff;
}

.btn-share:hover {
    box-shadow: 0 0 20px rgba(255, 45, 123, 0.4);
}

/* ===== FOOTER ===== */
.footer {
    text-align: center;
    padding: 24px 16px 32px;
    margin-top: 20px;
}

.patreon-cta {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(135deg, #ff424d, #ff6b3d);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    transition: transform 0.15s, box-shadow 0.2s;
    box-shadow: 0 4px 20px rgba(255, 66, 77, 0.3);
}

.patreon-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(255, 66, 77, 0.5);
}

.patreon-text {
    display: inline;
}

.copyright {
    margin-top: 16px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ===== DRAG GHOST (touch) ===== */
.drag-ghost {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    width: var(--thumb-size);
    height: var(--thumb-size);
    border-radius: 6px;
    overflow: hidden;
    border: 2px solid var(--neon-cyan);
    box-shadow: var(--shadow-neon);
    opacity: 0.9;
    transform: translate(-50%, -50%);
}

.drag-ghost img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ===== DROP INDICATOR ===== */
.drop-indicator {
    width: 3px;
    height: var(--thumb-size);
    background: var(--neon-cyan);
    border-radius: 2px;
    box-shadow: 0 0 8px var(--neon-cyan);
    flex-shrink: 0;
    pointer-events: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
    :root {
        --thumb-size: 64px;
    }

    .title-jp {
        font-size: 1.3rem;
    }

    .title-en {
        font-size: 0.7rem;
    }

    .tier-label {
        width: 44px;
        min-width: 44px;
        font-size: 1.4rem;
    }

    .tier-items {
        gap: 4px;
        padding: 6px;
    }

    .btn {
        padding: 10px 18px;
        font-size: 0.8rem;
    }

    .patreon-cta {
        padding: 12px 24px;
        font-size: 0.85rem;
    }
}

@media (min-width: 768px) {
    :root {
        --thumb-size: 90px;
    }

    .title-jp {
        font-size: 2rem;
    }

    .title-en {
        font-size: 1rem;
    }

    .tier-label {
        width: 80px;
        min-width: 80px;
        font-size: 2.2rem;
    }
}