:root {
    --navy: #10243e;
    --navy-2: #1b3a5e;
    --gold: #c9a24b;
    --bg: #f2f4f8;
    --card: #ffffff;
    --text: #212b38;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 14px 20px;
    background: linear-gradient(120deg, var(--navy), var(--navy-2));
    color: #fff;
}

.topbar .brand { font-weight: 700; }
.topbar a { color: var(--gold); text-decoration: none; }

.container { max-width: 720px; margin: 24px auto; padding: 0 16px; }

.card {
    background: var(--card);
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 18px;
    box-shadow: 0 2px 10px rgba(16, 36, 62, .08);
}

.card h1 { font-size: 1.35rem; margin-top: 0; }
.card h2 { font-size: 1.1rem; color: var(--navy-2); }
.center { text-align: center; }
.hint { font-size: .85rem; color: #667; }
.hint a { color: var(--navy-2); }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 22px;
    border: 0;
    border-radius: 10px;
    background: var(--navy-2);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.btn-green { background: #1e7e46; }
.btn-ms { background: #2f2f2f; }

select {
    display: block;
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    border-radius: 10px;
    border: 1px solid #c8d0dc;
    margin: 14px 0;
    background: #fff;
}

.rank-list { list-style: none; margin: 0; padding: 0; }

.rank-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    margin: 8px 0;
    background: #f7f9fc;
    border: 1px solid #dde4ee;
    border-radius: 10px;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
}

.rank-item.dragging { opacity: .5; }

.rank-num {
    min-width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--navy-2);
    color: var(--gold);
    font-weight: 700;
}

.rank-name { flex: 1; }
.rank-btns { display: flex; gap: 6px; }

.mv {
    width: 40px;
    height: 40px;
    border: 1px solid #c8d0dc;
    border-radius: 8px;
    background: #fff;
    font-size: 1rem;
    cursor: pointer;
}

.ppt-frame {
    width: 100%;
    height: 65vh;
    border: 1px solid #dde4ee;
    border-radius: 10px;
    margin-bottom: 16px;
}

.footer {
    text-align: center;
    color: #778;
    font-size: .8rem;
    padding: 24px;
}

table.admin { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.admin th, table.admin td { padding: 8px 10px; border-bottom: 1px solid #e4e9f1; text-align: left; }
table.admin th { background: #f0f3f8; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 20px; background: #e8eef7; font-size: .78rem; margin: 1px; }
.inline-form { display: inline; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }
input[type=text] { padding: 10px; border: 1px solid #c8d0dc; border-radius: 8px; width: 100%; margin: 6px 0; }
.btn-sm { padding: 6px 12px; font-size: .82rem; border-radius: 8px; }
.btn-red { background: #a33; }