:root {
    --color-primary: #07569e;
    --color-primary-dark: #054a86;
    --color-bg: #f0f2f5;
    --color-white: #ffffff;
    --color-border: #d8dee7;
    --color-text: #333333;
    --color-muted: #888888;
    --color-header-bg: #1a1a2e;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
}

/* ヘッダー */
.site-header {
    background: var(--color-header-bg);
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 54px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.site-header .logo {
    color: #fff;
    font-size: 1.1em;
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.site-header .logo img {
    height: 32px;
}
.site-header .logout-link {
    color: rgba(255,255,255,0.7);
    font-size: 0.82em;
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 5px 12px;
    border-radius: 4px;
    transition: background 0.2s;
}
.site-header .logout-link:hover {
    background: rgba(255,255,255,0.1);
}

/* ページコンテンツ */
.page-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 14px 40px;
}

/* ページタイトル */
.page-title {
    font-size: 1.1em;
    font-weight: bold;
    margin-bottom: 16px;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 並び替えバー */
.sort-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 0.88em;
    color: var(--color-muted);
}
.sort-bar select {
    padding: 5px 10px;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    background: var(--color-white);
    font-size: 0.95em;
    cursor: pointer;
}

/* フォトグリッド */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}
.photo-item {
    position: relative;
    padding-top: 100%;
    background: #222;
    overflow: hidden;
    cursor: pointer;
}
.photo-item a {
    position: absolute;
    inset: 0;
    display: block;
}
.photo-item .thumb {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: opacity 0.2s;
}
.photo-item:hover .thumb {
    opacity: 0.85;
}
.photo-item .video-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 2em;
    background: #333;
}

/* もっと見る */
.load-more {
    text-align: center;
    margin-top: 24px;
}
.load-more a,
.load-more button {
    display: inline-block;
    padding: 10px 28px;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    border-radius: 6px;
    font-size: 0.92em;
    text-decoration: none;
    background: var(--color-white);
    cursor: pointer;
    transition: background 0.2s;
}
.load-more a:hover,
.load-more button:hover {
    background: var(--color-primary);
    color: #fff;
}

/* 空メッセージ */
.empty-msg {
    text-align: center;
    color: var(--color-muted);
    padding: 40px 0;
    font-size: 0.95em;
}

/* クーポン */
.coupon-banner {
    background: linear-gradient(135deg, #ff6b9d, #c44569);
    color: #fff;
    border-radius: 8px;
    padding: 12px 18px;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.2s;
}
.coupon-banner:hover {
    opacity: 0.9;
}
.coupon-banner .coupon-title {
    font-weight: bold;
    font-size: 1em;
}
.coupon-banner .coupon-arrow {
    font-size: 1.2em;
}

/* ログインページ */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    padding: 20px;
}
.login-box {
    background: var(--color-white);
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 36px 30px;
    width: 100%;
    max-width: 380px;
    text-align: center;
}
.login-box .logo-img {
    max-width: 200px;
    margin-bottom: 24px;
}
.login-box .form-row {
    display: flex;
    align-items: center;
    margin-bottom: 14px;
    text-align: left;
}
.login-box .form-row label {
    width: 60px;
    font-weight: bold;
    font-size: 0.9em;
    color: var(--color-muted);
    flex-shrink: 0;
}
.login-box .form-row input {
    flex: 1;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1em;
}
.login-box .btn-login {
    display: block;
    width: 100%;
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 12px;
    border-radius: 6px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    margin-top: 6px;
    transition: background 0.2s;
}
.login-box .btn-login:hover {
    background: var(--color-primary-dark);
}
.login-error {
    color: crimson;
    font-size: 0.88em;
    margin-bottom: 12px;
}

/* レスポンシブ */
@media screen and (min-width: 600px) {
    .photo-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}
@media screen and (min-width: 900px) {
    .photo-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}