/* ========== 扁平化简约图床样式 ========== */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", sans-serif;
    background: #f5f7fa;
    color: #2c3e50;
    font-size: 14px;
    line-height: 1.6;
}
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* 顶部导航 */
.nav {
    max-width: 1000px;
    margin: 0 auto 20px;
    padding: 12px 0;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
.nav a {
    padding: 8px 14px;
    background: #fff;
    border-radius: 6px;
    color: #334155;
    border: 1px solid #eef0f3;
}
.nav a:hover { text-decoration: none; background: #f1f5f9; }
.nav a.active { background: #2563eb; color: #fff; border-color: #2563eb; }
.nav .spacer { flex: 1; }

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px 40px;
}
.card {
    background: #fff;
    border-radius: 8px;
    padding: 24px;
    border: 1px solid #eef0f3;
}
.card h2 { font-size: 18px; margin-bottom: 16px; color: #1e293b; }

/* 上传区 */
.upload-area {
    border: 2px dashed #cbd5e1;
    border-radius: 8px;
    padding: 48px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color .15s, background .15s;
    display: block;
}
.upload-area:hover { border-color: #2563eb; background: #eff6ff; }
.upload-area p { color: #64748b; font-size: 15px; }
.upload-area .hint { font-size: 12px; color: #94a3b8; margin-top: 8px; }

.btn {
    display: inline-block;
    padding: 9px 18px;
    background: #2563eb;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}
.btn:hover { background: #1d4ed8; }
.btn-danger { background: #ef4444; }
.btn-danger:hover { background: #dc2626; }
.btn-ghost { background: #fff; color: #475569; border: 1px solid #e5e7eb; }
.btn-ghost:hover { background: #f1f5f9; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; }

/* 图片网格 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-top: 16px;
}
.item {
    border: 1px solid #eef0f3;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
}
.item img {
    width: 100%;
    height: 140px;
    object-fit: cover;
}
.item .info { padding: 10px; font-size: 12px; color: #64748b; }
.item .info .ops { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 4px; }

/* 统计 */
.stats {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}
.stat {
    flex: 1;
    background: #fff;
    border: 1px solid #eef0f3;
    border-radius: 8px;
    padding: 14px 18px;
}
.stat .num { font-size: 22px; font-weight: 600; color: #1e293b; }
.stat .label { font-size: 12px; color: #94a3b8; }

/* 表单（登录/注册） */
.auth-body { background: #f5f7fa; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.auth-box {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: 10px;
    padding: 32px 28px;
    border: 1px solid #eef0f3;
}
.auth-box h2 { text-align: center; margin-bottom: 20px; color: #1e293b; }
.auth-box input {
    width: 100%;
    padding: 10px 12px;
    margin: 8px 0;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
}
.auth-box input:focus { border-color: #2563eb; }
.msg { color: #ef4444; font-size: 13px; text-align: center; margin: 8px 0; }
.auth-foot { text-align: center; margin-top: 14px; font-size: 13px; color: #64748b; }

/* 登录/注册页品牌区 */
.auth-wrap {
    width: 100%;
    max-width: 380px;
    text-align: center;
}
.auth-brand { margin-bottom: 24px; }
.brand-logo {
    width: 64px; height: 64px;
    margin: 0 auto 12px;
    background: linear-gradient(135deg, #2563eb, #4f46e5);
    color: #fff;
    font-size: 30px;
    font-weight: 600;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(37, 99, 235, .3);
}
.brand-name {
    font-size: 24px;
    color: #1e293b;
    margin-bottom: 6px;
}
.brand-slogan {
    font-size: 13px;
    color: #94a3b8;
}
.auth-icp {
    margin-top: 20px;
    font-size: 12px;
}
.auth-icp a { color: #94a3b8; }

/* 提示条 */
.alert { padding: 10px 14px; border-radius: 6px; margin: 10px 0; font-size: 13px; }
.alert-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

/* 分享页 */
.share-body { background: #f5f7fa; min-height: 100vh; padding: 20px; }
.share-box {
    max-width: 900px;
    margin: 20px auto;
    background: #fff;
    border-radius: 10px;
    padding: 24px;
    text-align: center;
    border: 1px solid #eef0f3;
}
.share-box img {
    max-width: 100%;
    max-height: 70vh;
    margin: 16px auto;
    border-radius: 8px;
}
.share-meta { color: #64748b; font-size: 13px; margin: 10px 0; }
.share-actions { margin-top: 16px; display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }

.empty { text-align: center; padding: 40px 0; color: #94a3b8; }
.footer { text-align: center; padding: 20px; color: #94a3b8; font-size: 12px; }