/* ========================================
   清新绿主题 - Fresh Green UI
   ======================================== */

:root {
    --primary: #10b981;
    --primary-hover: #059669;
    --primary-light: #ecfdf5;
    --secondary: #475569;
    --bg-body: #f0fdf4;
    --bg-card: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #d1fae5;
    --border-light: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 4px 6px rgba(16, 185, 129, 0.1), 0 2px 4px rgba(0, 0, 0, 0.04);
    --radius: 10px;
    --transition: all 0.2s ease;
    --success: #059669;
    --success-bg: #ecfdf5;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --accent: #10b981;
}

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

body {
    background: var(--bg-body);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    font-size: 14px;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f0fdf4; }
::-webkit-scrollbar-thumb { background: #6ee7b7; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #10b981; }

.forum-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 页面头部 */
.header {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px 32px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border-bottom: 3px solid var(--primary);
}
.header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.header p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: var(--radius);
    padding: 0 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.2);
    position: sticky;
    top: 10px;
    z-index: 100;
}
.nav-logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: #ffffff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 0;
}
.nav-links {
    display: flex;
    gap: 4px;
    align-items: center;
    flex-wrap: wrap;
}
.nav-link {
    padding: 8px 14px;
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
}
.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}
.nav-link.primary {
    background: #ffffff;
    color: var(--primary);
    font-weight: 600;
}
.nav-link.primary:hover {
    background: #f0fdf4;
    transform: translateY(-1px);
}
.user-greeting {
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    padding: 6px 12px;
    border-radius: 20px;
    margin-right: 8px;
}

/* 状态指示器 */
.latency-badge, .online-badge, .exp-bar {
    font-size: 0.75rem;
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    margin-right: 5px;
}

/* 信号格样式 */
.signal-bars {
    display: inline-flex;
    align-items: flex-end;
    gap: 2px;
    height: 16px;
    vertical-align: middle;
    margin-right: 4px;
}

.signal-bar {
    display: inline-block;
    width: 3px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 1px;
    transition: background-color 0.3s ease, height 0.3s ease;
}

.signal-bar.bar-1 { height: 4px; }
.signal-bar.bar-2 { height: 7px; }
.signal-bar.bar-3 { height: 10px; }
.signal-bar.bar-4 { height: 13px; }
.signal-bar.bar-5 { height: 16px; }

/* 激活状态 - 根据延迟显示不同颜色 */
.signal-bar.active {
    background-color: #4ade80; /* 绿色 - 默认快速 */
}

/* 慢速状态 - 黄色 */
.latency-badge.slow .signal-bar.active {
    background-color: #fbbf24;
}

/* 极慢状态 - 红色 */
.latency-badge.very-slow .signal-bar.active {
    background-color: #f87171;
}

.latency-text {
    font-size: 0.75rem;
    vertical-align: middle;
}

/* 按钮 */
.btn {
    padding: 9px 18px;
    border: 1px solid var(--border);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 0.85rem;
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-main);
}
.btn:hover {
    background: var(--primary-light);
    border-color: var(--primary);
}
.btn-primary {
    background: var(--primary);
    color: #ffffff;
    border: none;
}
.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.3);
}
.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: #fecaca;
}
.btn-danger:hover {
    background: var(--danger);
    color: white;
}
.btn-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: #a7f3d0;
}
.btn-success:hover {
    background: var(--success);
    color: white;
}
.btn-sm {
    padding: 5px 12px;
    font-size: 0.75rem;
}

/* 帖子列表 */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.post-item {
    background: var(--bg-card);
    padding: 18px 22px;
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid var(--border-light);
    cursor: pointer;
}
.post-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}
.post-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 6px;
}
.post-title a {
    text-decoration: none;
    color: var(--text-main);
    transition: var(--transition);
}
.post-title a:hover {
    color: var(--primary);
}
.post-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    gap: 15px;
}
.post-excerpt {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 6px;
}

/* 通用卡片 */
.card {
    background: var(--bg-card);
    padding: 22px;
    margin-bottom: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow);
}

/* 回复卡片 */
.reply-card {
    background: #f0fdf4;
    padding: 14px;
    margin-bottom: 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
}
.reply-meta {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 4px;
}
.reply-content {
    color: var(--text-main);
    font-size: 0.9rem;
}

/* 表单 */
input, textarea, select {
    width: 100%;
    padding: 10px 14px;
    margin: 6px 0 14px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: var(--transition);
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}
label {
    font-weight: 600;
    color: var(--text-main);
    font-size: 0.85rem;
    margin-bottom: 4px;
    display: block;
}

/* 分页 */
.pagination {
    background: var(--bg-card);
    padding: 14px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
}
.page-info {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* 空状态 */
.empty-msg {
    background: var(--bg-card);
    padding: 40px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
}

/* 返回链接 */
.back-link {
    display: inline-flex;
    align-items: center;
    margin-bottom: 14px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.85rem;
}
.back-link:hover {
    text-decoration: underline;
}

/* 验证码 & 上传 */
.captcha-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 6px 0 14px;
    flex-wrap: wrap;
}
.captcha-img {
    cursor: pointer;
    border: 1px solid var(--border);
    border-radius: 8px;
    height: 40px;
}
.image-upload {
    margin: 12px 0;
    padding: 18px;
    background: #f0fdf4;
    border: 2px dashed var(--border);
    border-radius: 8px;
    text-align: center;
    color: var(--text-muted);
}
.preview-image {
    max-width: 100%;
    max-height: 150px;
    margin-top: 10px;
    border-radius: 8px;
}

/* 主题切换 */
.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.25);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: #ffffff;
    transition: var(--transition);
}
.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 动画 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.post-item, .card {
    animation: fadeInUp 0.3s ease-out;
}

/* 徽章 */
.badge-quest {
    background: var(--primary-light);
    color: var(--primary);
    padding: 2px 8px;
    font-size: 0.7rem;
    border-radius: 4px;
    font-weight: 600;
}

/* 响应式 */
@media (max-width: 768px) {
    .forum-wrapper { padding: 12px; }
    .header { padding: 16px; }
    .header h1 { font-size: 1.3rem; }
    .navbar { flex-direction: column; align-items: stretch; position: static; padding: 10px; }
    .nav-links { justify-content: center; }
    .post-item { padding: 14px; }
    .post-title { font-size: 0.95rem; }
}