/* ==========================================================================
   客户端公共样式（深色主题）
   职责：定义客户端全局 CSS 变量、基础重置、登录页样式
   样式目录：
   - css/client.css                 本文件：变量 / 重置 / 登录页
   - css/layout.css                 登录后内页统一布局骨架（.app-shell）
   - css/components/app-header.css  统一顶部栏组件（各内页复用）
   - css/pages/home.css             产品中心（首页）
   ========================================================================== */

/* -------------------- 深色主题变量 -------------------- */
:root {
    --client-bg: #232324;
    --client-bg-secondary: #2a2a2e;
    --client-bg-deep: #17171a;
    --client-panel: rgba(32, 32, 36, 0.72);
    --client-field: rgba(255, 255, 255, 0.04);
    --client-text: #ffffff;
    --client-text-secondary: rgba(255, 255, 255, 0.65);
    --client-text-muted: rgba(255, 255, 255, 0.38);
    --client-border: rgba(255, 255, 255, 0.09);
    --client-blue: #1e9fff;
    --client-green: #16b777;
    --client-danger: #ff7043;
    --client-gradient: linear-gradient(135deg, #1e9fff 0%, #16b777 100%);
    --client-radius-lg: 20px;
    --client-radius-md: 12px;
    --client-shadow-card: 0 24px 80px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    --client-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* -------------------- 基础重置 -------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* ==================== 登录页 ==================== */

/* 全屏容器：渐变底色 + 居中卡片 */
.login-page {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 24px;
    background:
        radial-gradient(1200px 800px at 85% -10%, rgba(30, 159, 255, 0.14), transparent 60%),
        radial-gradient(1000px 700px at -10% 110%, rgba(22, 183, 119, 0.13), transparent 60%),
        linear-gradient(135deg, #17171a 0%, #232324 45%, #1b1b20 100%);
}

/* 细腻网格纹理（边缘渐隐） */
.login-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 44px 44px;
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    pointer-events: none;
}

/* 浮动光斑 */
.login-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.22;
    pointer-events: none;
    animation: login-float 10s ease-in-out infinite;
}

.login-glow--blue {
    width: 420px;
    height: 420px;
    background: var(--client-blue);
    top: -120px;
    right: -100px;
}

.login-glow--green {
    width: 360px;
    height: 360px;
    background: var(--client-green);
    bottom: -100px;
    left: -90px;
    animation-delay: -5s;
}

@keyframes login-float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-32px) scale(1.06); }
}

/* 毛玻璃卡片 */
.login-card {
    position: relative;
    z-index: 1;
    width: 420px;
    max-width: 100%;
    padding: 44px 40px 36px;
    background: var(--client-panel);
    border: 1px solid var(--client-border);
    border-radius: var(--client-radius-lg);
    box-shadow: var(--client-shadow-card);
    backdrop-filter: blur(24px) saturate(140%);
    -webkit-backdrop-filter: blur(24px) saturate(140%);
    animation: login-card-in 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes login-card-in {
    from { opacity: 0; transform: translateY(24px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 登录失败抖动 */
.login-card.is-shake {
    animation: login-shake 0.45s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

@keyframes login-shake {
    10%, 90% { transform: translateX(-1px); }
    20%, 80% { transform: translateX(2px); }
    30%, 50%, 70% { transform: translateX(-5px); }
    40%, 60% { transform: translateX(5px); }
}

/* 品牌区 */
.login-brand {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 18px;
    border-radius: 18px;
    background: var(--client-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(30, 159, 255, 0.35);
}

.login-logo svg {
    width: 34px;
    height: 34px;
    fill: #fff;
}

.login-eyebrow {
    font-size: 11px;
    letter-spacing: 4px;
    color: var(--client-text-muted);
    margin-bottom: 8px;
}

.login-title {
    font-size: 25px;
    font-weight: 600;
    color: var(--client-text);
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 13px;
    color: var(--client-text-muted);
}

/* 密钥输入框 */
.login-field {
    position: relative;
    margin-bottom: 20px;
}

.login-input {
    width: 100%;
    height: 50px;
    padding: 0 16px 0 46px;
    font-size: 14px;
    letter-spacing: 0.5px;
    color: var(--client-text);
    background: var(--client-field);
    border: 1px solid var(--client-border);
    border-radius: var(--client-radius-md);
    outline: none;
    transition: border-color var(--client-transition), box-shadow var(--client-transition), background var(--client-transition);
}

.login-input::placeholder {
    color: var(--client-text-muted);
    letter-spacing: 0;
    text-align: center;
    text-indent: -30px; /* 抵消左侧图标占位，使 placeholder 视觉居中 */
}

.login-input:hover {
    border-color: rgba(255, 255, 255, 0.22);
}

.login-input:focus {
    border-color: var(--client-blue);
    background: rgba(30, 159, 255, 0.06);
    box-shadow: 0 0 0 3px rgba(30, 159, 255, 0.15);
}

.login-field-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 19px;
    height: 19px;
    fill: var(--client-text-muted);
    transition: fill var(--client-transition);
    pointer-events: none;
}

.login-input:focus ~ .login-field-icon {
    fill: var(--client-blue);
}

/* 进入按钮 */
.login-btn {
    width: 100%;
    height: 50px;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 6px;
    text-indent: 6px; /* 抵消字间距带来的视觉偏移 */
    color: #fff;
    background: var(--client-gradient);
    border: none;
    border-radius: var(--client-radius-md);
    cursor: pointer;
    transition: transform var(--client-transition), box-shadow var(--client-transition), opacity var(--client-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(30, 159, 255, 0.35);
}

.login-btn:active:not(:disabled) {
    transform: translateY(0);
}

.login-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.login-btn-spinner {
    display: none;
    width: 16px;
    height: 16px;
    margin-right: 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: login-spin 0.6s linear infinite;
}

.login-btn.is-loading .login-btn-spinner {
    display: inline-block;
}

@keyframes login-spin {
    to { transform: rotate(360deg); }
}

/* -------------------- 其他登录方式（Windows 集成认证） -------------------- */
.login-alt {
    margin-top: 22px;
}

.login-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--client-text-muted);
    font-size: 12px;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
}

.login-passkey-btn {
    width: 100%;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    font-size: 14px;
    color: #c9d6e8;
    background: rgba(30, 159, 255, 0.07);
    border: 1px solid rgba(30, 159, 255, 0.35);
    border-radius: var(--client-radius-md);
    cursor: pointer;
    transition: all var(--client-transition);
}

.login-passkey-btn:hover:not(:disabled) {
    background: rgba(30, 159, 255, 0.15);
    border-color: rgba(30, 159, 255, 0.7);
    color: #fff;
}

.login-passkey-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-passkey-icon {
    width: 18px;
    height: 18px;
    fill: #1e9fff;
    flex-shrink: 0;
}

.login-passkey-spinner {
    display: none;
    width: 15px;
    height: 15px;
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-top-color: #fff;
    border-radius: 50%;
    animation: login-spin 0.6s linear infinite;
}

.login-passkey-btn.is-loading .login-passkey-spinner {
    display: inline-block;
}

.login-passkey-hint {
    margin-top: 10px;
    text-align: center;
    font-size: 12px;
    line-height: 1.7;
    color: var(--client-text-muted);
}

/* 错误提示 */
.login-error {
    min-height: 20px;
    margin-top: 14px;
    text-align: center;
    font-size: 13px;
    color: var(--client-danger);
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity var(--client-transition), transform var(--client-transition);
}

.login-error.show {
    opacity: 1;
    transform: translateY(0);
}

/* 页脚版权 */
.login-footer {
    position: absolute;
    bottom: 22px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 12px;
    color: var(--client-text-muted);
    z-index: 1;
}

/* -------------------- 响应式 -------------------- */
@media (max-width: 480px) {
    .login-card {
        padding: 36px 26px 30px;
    }
    .login-title {
        font-size: 22px;
    }
}

/* -------------------- 动效降级 -------------------- */
@media (prefers-reduced-motion: reduce) {
    .login-glow,
    .login-card {
        animation: none;
    }
}