/* ============================================================
   theme.css — 自定义设计系统（替代 Semantic UI）
   设计语言：现代简约 / 蓝绿科技感 / 圆角卡片 / 柔和阴影
   ============================================================ */

:root {
    /* 色板 */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-soft: #eff6ff;
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --teal: #0d9488;
    --teal-hover: #0f766e;
    --teal-soft: #f0fdfa;
    --red: #ef4444;
    --red-hover: #dc2626;
    --red-soft: #fef2f2;
    --amber: #f59e0b;
    --amber-hover: #d97706;
    --amber-soft: #fffbeb;
    --purple: #7c3aed;
    --purple-soft: #f5f3ff;
    --slate: #2f4056;
    --slate-hover: #243447;
    --slate-soft: #f1f5f9;

    /* 中性色 */
    --bg: #f1f5f9;
    --surface: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;

    /* 圆角 / 阴影 */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 12px rgba(15, 23, 42, .06);
    --shadow-lg: 0 8px 24px rgba(15, 23, 42, .14), 0 2px 8px rgba(15, 23, 42, .06);
    --shadow-primary: 0 4px 14px rgba(37, 99, 235, .35);

    /* 字体 */
    --font: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "Cascadia Code", Consolas, monospace;
}

/* 基础重置 */
html {
    font-family: var(--font);
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 图标通用类 */
.ic {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.125em;
    fill: currentColor;
    flex-shrink: 0;
}

.ic-lg {
    width: 1.25em;
    height: 1.25em;
}

.ic-blue { color: var(--primary); }
.ic-red { color: var(--red); }
.ic-teal { color: var(--teal); }
.ic-orange { color: var(--amber); }
.ic-slate { color: var(--slate); }

/* ============================================================
   登录页
   ============================================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(145deg, #e8f1fb 0%, #f5f7ff 40%, #e6f7f5 100%);
}

/* 背景装饰 */
.login-page::before,
.login-page::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.login-page::before {
    width: 480px;
    height: 480px;
    top: -160px;
    right: -120px;
    background: radial-gradient(circle at 30% 30%, rgba(59, 130, 246, .18), transparent 70%);
}

.login-page::after {
    width: 520px;
    height: 520px;
    bottom: -200px;
    left: -140px;
    background: radial-gradient(circle at 60% 60%, rgba(13, 148, 136, .16), transparent 70%);
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, .9);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 44px 40px 40px;
    animation: login-in .45s cubic-bezier(.21, 1.02, .73, 1) both;
}

@keyframes login-in {
    from {
        opacity: 0;
        transform: translateY(18px) scale(.98);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

.login-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 28px;
    text-align: center;
}

.login-logo img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    margin-bottom: 14px;
}

.login-logo .login-title {
    font-size: 21px;
    font-weight: 600;
    letter-spacing: .5px;
    color: var(--text);
}

.login-logo .login-sub {
    margin-top: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.login-form .field {
    margin-bottom: 18px;
}

.login-input-wrap {
    position: relative;
}

.login-input-wrap .ic {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    transition: color .2s ease;
    pointer-events: none;
}

.login-input {
    width: 100%;
    height: 46px;
    padding: 0 14px 0 42px;
    font-size: 14px;
    color: var(--text);
    background: #f8fafc;
    border: 1.5px solid var(--border-strong);
    border-radius: var(--radius);
    outline: none;
    box-sizing: border-box;
    transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}

.login-input::placeholder {
    color: #94a3b8;
}

.login-input:focus {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .12);
}

.login-input-wrap:focus-within .ic {
    color: var(--primary);
}

.login-btn {
    width: 100%;
    height: 46px;
    margin-top: 6px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 2px;
    color: #fff;
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    position: relative;
    transition: box-shadow .2s ease, transform .1s ease, opacity .2s ease;
    box-shadow: var(--shadow-primary);
}

.login-btn:hover {
    box-shadow: 0 6px 20px rgba(37, 99, 235, .45);
}

.login-btn:active {
    transform: translateY(1px);
}

.login-btn:disabled {
    opacity: .75;
    cursor: not-allowed;
}

/* 按钮 loading 态：左侧旋转圆环 */
.login-btn.is-loading {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.login-btn .spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255, 255, 255, .35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .7s linear infinite;
}

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

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

/* 登录错误提示 */
.login-alert {
    display: none;
    margin-top: 16px;
    padding: 10px 14px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--red);
    background: var(--red-soft);
    border: 1px solid rgba(239, 68, 68, .25);
    border-radius: var(--radius-sm);
    align-items: center;
    gap: 8px;
}

.login-alert.show {
    display: flex;
}

.login-alert .ic {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* 错误抖动 */
@keyframes shake {
    10%, 90% { transform: translateX(-1px); }
    20%, 80% { transform: translateX(2px); }
    30%, 50%, 70% { transform: translateX(-4px); }
    40%, 60% { transform: translateX(4px); }
}

.shake {
    animation: shake .5s cubic-bezier(.36, .07, .19, .97) both;
}

.login-footer {
    margin-top: 26px;
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
}

/* ============================================================
   通用组件（对话框按钮等复用）
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0 18px;
    height: 34px;
    font-size: 13px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color .18s ease, color .18s ease, box-shadow .18s ease, transform .1s ease;
    user-select: none;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 2px 8px rgba(37, 99, 235, .35); }
.btn-teal { background: var(--teal); color: #fff; }
.btn-teal:hover { background: var(--teal-hover); }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: var(--red-hover); }
.btn-amber { background: var(--amber); color: #fff; }
.btn-amber:hover { background: var(--amber-hover); }
.btn-slate { background: var(--slate); color: #fff; }
.btn-slate:hover { background: var(--slate-hover); }
.btn-plain { background: #fff; color: var(--text); border: 1px solid var(--border-strong); }
.btn-plain:hover { border-color: var(--primary); color: var(--primary); }