:root {
    --color-cream: #FBF6EE;
    --color-beige: #F0E4D0;
    --color-green: #7A9D6F;
    --color-green-dark: #5C7D52;
    --color-orange: #E29A4B;
    --color-orange-dark: #C97F30;
    --color-text: #4A3F35;
    --color-text-light: #8A7D6E;
    --color-white: #FFFFFF;
    --radius: 14px;
    --shadow: 0 2px 10px rgba(74, 63, 53, 0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Hiragino Maru Gothic ProN", "BIZ UDPGothic", "Yu Gothic", sans-serif;
    background: var(--color-cream);
    color: var(--color-text);
    line-height: 1.7;
}

a { color: var(--color-green-dark); }

.site-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-beige);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 10;
}

.site-header .brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-green-dark);
    text-decoration: none;
}

.site-header .class-name {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.logout-link {
    font-size: 0.85rem;
    color: var(--color-text-light);
    text-decoration: none;
    border: 1px solid var(--color-beige);
    padding: 6px 12px;
    border-radius: 20px;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 16px 60px;
}

.card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px;
}

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    text-align: center;
}

.login-card h1 {
    color: var(--color-green-dark);
    margin-bottom: 4px;
}

.login-card p.sub {
    color: var(--color-text-light);
    margin-top: 0;
    font-size: 0.9rem;
}

label {
    display: block;
    text-align: left;
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin: 14px 0 6px;
}

input[type=text], input[type=password], input[type=file], select, textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--color-beige);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--color-cream);
    color: var(--color-text);
}

button, .btn {
    display: inline-block;
    background: var(--color-orange);
    color: var(--color-white);
    border: none;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 18px;
    text-decoration: none;
    text-align: center;
}

button:hover, .btn:hover { background: var(--color-orange-dark); }

.btn-secondary {
    background: var(--color-green);
}
.btn-secondary:hover { background: var(--color-green-dark); }

.error {
    background: #FBE9E7;
    color: #B4483A;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.success {
    background: #EAF3E4;
    color: var(--color-green-dark);
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 14px;
    margin-top: 20px;
}

.media-item {
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.media-item .thumb-wrap {
    position: relative;
    width: 100%;
    padding-top: 100%; /* 1:1の正方形を作る（aspect-ratioは古いSafariが非対応のため使わない） */
    background: var(--color-beige);
    overflow: hidden;
}

.media-item img.thumb, .media-item video.thumb {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.video-thumb-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-green);
}

.video-play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.video-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0,0,0,0.55);
    color: #fff;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 12px;
    z-index: 2;
}

.media-meta {
    padding: 8px 10px 12px;
    font-size: 0.78rem;
    color: var(--color-text-light);
}

.media-actions {
    display: flex;
    gap: 6px;
    padding: 0 10px 10px;
}

.media-actions a, .media-actions button {
    flex: 1;
    margin: 0;
    padding: 8px 4px;
    font-size: 0.8rem;
    border-radius: 8px;
}

.empty-state {
    text-align: center;
    color: var(--color-text-light);
    padding: 60px 20px;
}

.page-title {
    color: var(--color-green-dark);
    margin: 0 0 4px;
}

.page-sub {
    color: var(--color-text-light);
    margin-top: 0;
    font-size: 0.9rem;
}

table.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
    font-size: 0.9rem;
}

table.admin-table th, table.admin-table td {
    text-align: left;
    padding: 10px 8px;
    border-bottom: 1px solid var(--color-beige);
}

.nav-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.nav-tabs a {
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--color-white);
    color: var(--color-text);
    font-size: 0.85rem;
    box-shadow: var(--shadow);
}

.nav-tabs a.active {
    background: var(--color-green);
    color: var(--color-white);
}

.lightbox-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 56px 20px 20px;
}

.lightbox-overlay.active { display: flex; }

.lightbox-overlay img, .lightbox-overlay video {
    max-width: 100%;
    max-height: 75vh;
    border-radius: 8px;
}

.lightbox-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
    color: #fff;
    font-size: 1.8rem;
    line-height: 1;
    background: rgba(0,0,0,0.5);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    margin: 0;
    padding: 0;
    z-index: 101;
}

.helper-text {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

.expiry-warning {
    color: #B4483A;
    font-weight: 700;
    font-size: 0.78rem;
}

.staff-name-banner {
    background: var(--color-beige);
    color: var(--color-green-dark);
    font-weight: 700;
    text-align: center;
    padding: 8px 12px;
    font-size: 0.9rem;
}

@media print {
    .no-print { display: none !important; }
}

.color-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-top: 4px;
}

.color-option {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: normal;
    font-size: 0.9rem;
    color: var(--color-text);
    margin: 0;
    cursor: pointer;
}

.color-option input[type=radio] {
    width: auto;
}

.color-swatch {
    display: inline-block;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.15);
}

.upload-progress-track {
    width: 100%;
    height: 10px;
    background: var(--color-beige);
    border-radius: 6px;
    overflow: hidden;
}

.upload-progress-fill {
    height: 100%;
    background: var(--color-orange);
    border-radius: 6px;
    transition: width 0.2s ease;
}