/* ============================================
   全局样式 - 现代简约
   ============================================ */

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

html, body { height: 100%; overflow: hidden; }

body {
    font-family: var(--font);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
}

/* ============ 通用玻璃卡片 ============ */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
}

.glass-card:hover {
    box-shadow: var(--card-shadow-hover);
}

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font);
    border: none;
    border-radius: var(--r-sm);
    cursor: pointer;
    transition: all var(--ease);
    outline: none;
    user-select: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-full {
    width: 100%;
    padding: 13px;
    font-size: 15px;
    letter-spacing: 0.5px;
}

.btn-sm {
    padding: 9px 16px;
    font-size: 13px;
    background: var(--glass-strong);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--r-sm);
    white-space: nowrap;
    transition: all var(--ease);
}

.btn-sm:hover {
    background: linear-gradient(135deg, var(--accent), var(--accent));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.35);
}

.btn-sm:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.35);
    color: var(--text-secondary);
    padding: 8px 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--ease);
}

.btn-ghost:hover {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
    border-color: rgba(239, 68, 68, 0.3);
}

.btn-send {
    background: linear-gradient(135deg, var(--accent), var(--accent));
    color: #fff;
    padding: 12px 28px;
    border-radius: var(--r-md);
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(14, 165, 233, 0.35);
    transition: all var(--ease);
}

.btn-send:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.45);
}

.btn-send:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

/* ============ 表单输入 ============ */
.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--glass-strong);
    backdrop-filter: blur(4px);
    border: 1.5px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--r-sm);
    color: var(--text);
    font-size: 15px;
    font-family: var(--font);
    transition: all var(--ease);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
}

.form-input::placeholder {
    color: var(--text-muted);
}

/* ============ 头像 ============ */
.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.avatar.large {
    width: 80px;
    height: 80px;
    font-size: 32px;
}

/* ============ 消息提示 ============ */
.auth-message {
    margin-top: 10px;
    padding: 10px 14px;
    border-radius: var(--r-sm);
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    display: none;
    animation: fadeIn 0.25s ease;
}

.auth-message.error {
    display: block;
    background: rgba(220, 38, 38, 0.1);
    color: var(--error);
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.auth-message.success {
    display: block;
    background: rgba(22, 163, 74, 0.1);
    color: var(--success);
    border: 1px solid rgba(22, 163, 74, 0.2);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============ 设置弹窗 ============ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: overlayIn 0.2s ease;
}

@keyframes overlayIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    width: 92%;
    max-width: 440px;
    border-radius: var(--r-lg);
    overflow: hidden;
    animation: slideUp 0.3s var(--bounce);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.modal-header h3 {
    margin: 0;
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--ease);
    line-height: 1;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.6);
    color: var(--text);
}

.modal-body {
    padding: 20px;
}

/* ============ 个人主页卡片 ============ */
.profile-card {
    text-align: center;
    padding: 24px 16px 20px;
}

.profile-avatar-wrap {
    position: relative;
    display: inline-block;
    margin-bottom: 14px;
    cursor: pointer;
}

.profile-avatar-wrap .avatar.large {
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    transition: filter var(--ease);
}

.profile-avatar-wrap:hover .avatar.large {
    filter: brightness(0.7);
}

.avatar-upload-overlay {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    opacity: 0;
    transition: opacity var(--ease);
    background: rgba(0,0,0,0.3);
}

.profile-avatar-wrap:hover .avatar-upload-overlay {
    opacity: 1;
}

#avatar-file-input { display: none; }

.profile-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 2px;
}

.profile-email {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.profile-stats-row {
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.settings-divider {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.5), transparent);
    margin: 16px 0;
}

.settings-section {
    margin-bottom: 20px;
}

.settings-section:last-child { margin-bottom: 0; }

.settings-section h4 {
    margin: 0 0 12px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
}

/* ============ 重置密码表单 ============ */
.reset-pw-form {
    padding: 4px 0;
}

.reset-pw-form .form-group {
    margin-bottom: 10px;
}

.reset-pw-form .form-group:last-child {
    margin-bottom: 0;
}

.reset-pw-form .form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--glass-border);
    border-radius: var(--r-sm);
    background: var(--glass-bg);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color var(--ease);
    box-sizing: border-box;
}

.reset-pw-form .form-input:focus {
    border-color: var(--primary);
}

.reset-pw-form .form-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* ============ 主题选择器 ============ */
.theme-options-large {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

.theme-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 6px;
    border-radius: var(--r-sm);
    cursor: pointer;
    transition: all var(--ease);
    border: 2px solid transparent;
    background: rgba(255,255,255,0.15);
}

.theme-item:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.theme-item.active {
    border-color: var(--primary);
    background: rgba(255,255,255,0.35);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.4), 0 4px 12px rgba(0,0,0,0.08);
}

.theme-preview {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform var(--ease);
}

.theme-item:hover .theme-preview { transform: scale(1.12); }

.theme-item.active .theme-preview {
    box-shadow: 0 0 0 3px #fff, 0 2px 12px rgba(0,0,0,0.12);
}

.theme-preview.blue { background: linear-gradient(135deg, #3b82f6, #6366f1); }
.theme-preview.green { background: linear-gradient(135deg, #16a34a, #14b8a6); }
.theme-preview.purple { background: linear-gradient(135deg, #8b5cf6, #d946ef); }
.theme-preview.orange { background: linear-gradient(135deg, #ea580c, #e11d48); }
.theme-preview.gray { background: linear-gradient(135deg, #64748b, #818cf8); }

.theme-item span {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
}

.theme-item.active span { color: var(--text); }

/* ============ 设置按钮 ============ */
.settings-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--glass-strong);
    backdrop-filter: blur(12px);
    border-radius: 50%;
    font-size: 14px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--ease);
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.settings-btn:hover {
    background: rgba(255,255,255,0.7);
    color: var(--text);
    transform: rotate(90deg);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

/* ============ 用户信息弹窗 ============ */
.user-info-card {
    width: 320px;
    border-radius: var(--r-lg);
    overflow: hidden;
    animation: slideUp 0.3s var(--bounce);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.user-info-header {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px 20px 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.user-info-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid rgba(255,255,255,0.8);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    background: rgba(255,255,255,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-info-avatar-text {
    font-size: 28px;
    color: #fff;
    font-weight: 700;
}

.modal-close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--ease);
    line-height: 1;
}

.modal-close-btn:hover {
    background: rgba(255,255,255,0.6);
}

.user-info-body {
    padding: 20px;
    text-align: center;
}

.user-info-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
}

.user-info-meta {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--glass-border);
    font-size: 13px;
}

.user-info-meta:last-child {
    border-bottom: none;
}

.user-info-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.user-info-value {
    color: var(--text);
    font-weight: 600;
}