/*!
 * 铿柱管理后台 · 登录页样式
 * 独立页面，不依赖 _AdminLayout 的 sidebar/topbar
 * 参考：https://sunyctf.github.io/login-demos/css现代风网站登录页/
 * 适配现有管理后台色调：深色背景 + 白色卡片 + 青色主题色
 */

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

html,
body {
    height: 100%;
    font-family: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: linear-gradient(135deg, #0F172A 0%, #1e293b 50%, #0F172A 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

/* ============================================================
   登录容器
   ============================================================ */
.login-wrapper {
    width: 100%;
    max-width: 920px;
    padding: 1.5rem;
}

.login-card {
    display: flex;
    background: #FFFFFF;
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    min-height: 480px;
}

/* ============================================================
   左侧：表单区
   ============================================================ */
.login-form-section {
    flex: 1;
    padding: 2.5rem 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 2rem;
}

.login-logo svg {
    width: 2rem;
    height: 2rem;
    color: #0891B2;
}

.login-logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: #0F172A;
    letter-spacing: -0.02em;
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #0F172A;
    line-height: 1.3;
    margin-bottom: 0.375rem;
}

.login-subtitle {
    font-size: 0.875rem;
    color: #64748B;
    margin-bottom: 2rem;
    line-height: 1.5;
}

/* ============================================================
   表单元素
   ============================================================ */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-group label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: #334155;
}

.form-input-wrapper {
    position: relative;
}

.form-input-wrapper .input-icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.125rem;
    height: 1.125rem;
    color: #94A3B8;
    pointer-events: none;
}

.login-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    font-size: 0.9375rem;
    color: #0F172A;
    background: #F8FAFC;
    border: 1.5px solid #E2E8F0;
    border-radius: 0.5rem;
    outline: none;
    transition: all 0.2s ease;
    font-family: inherit;
}

.login-input::placeholder {
    color: #94A3B8;
}

.login-input:focus {
    background: #FFFFFF;
    border-color: #0891B2;
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.15);
}

.login-input.error {
    border-color: #EF4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

/* ============================================================
   登录按钮
   ============================================================ */
.login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.8125rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    color: #FFFFFF;
    background: #0891B2;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    margin-top: 0.5rem;
}

.login-btn:hover:not(:disabled) {
    background: #0E7490;
    box-shadow: 0 4px 12px rgba(8, 145, 178, 0.35);
    transform: translateY(-1px);
}

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

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

.login-btn .btn-spinner {
    display: none;
    width: 1.125rem;
    height: 1.125rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #FFFFFF;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.login-btn.is-loading .btn-text {
    opacity: 0.8;
}

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

/* ============================================================
   错误提示
   ============================================================ */
.login-error {
    display: none;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 0.8125rem;
    color: #DC2626;
    background: #FEF2F2;
    border: 1px solid #FECACA;
    border-radius: 0.5rem;
    margin-top: 0.25rem;
}

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

.login-error svg {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
}

/* ============================================================
   右侧：品牌展示区
   ============================================================ */
.login-brand-section {
    flex: 1;
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.08) 0%, rgba(8, 145, 178, 0.04) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-brand-section::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -30%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(8, 145, 178, 0.06);
    pointer-events: none;
}

.login-brand-section::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -20%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(8, 145, 178, 0.04);
    pointer-events: none;
}

.login-brand-icon {
    width: 5rem;
    height: 5rem;
    color: #0891B2;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.login-brand-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.login-brand-desc {
    font-size: 0.875rem;
    color: #475569;
    line-height: 1.6;
    max-width: 260px;
    position: relative;
    z-index: 1;
}

.login-brand-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
    position: relative;
    z-index: 1;
}

.login-brand-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: #475569;
}

.login-brand-feature svg {
    width: 1rem;
    height: 1rem;
    color: #10B981;
    flex-shrink: 0;
}

/* ============================================================
   版权信息
   ============================================================ */
.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
    .login-card {
        flex-direction: column-reverse;
        min-height: auto;
    }

    .login-form-section {
        padding: 2rem 1.5rem;
    }

    .login-brand-section {
        padding: 2rem 1.5rem;
    }

    .login-brand-section::before,
    .login-brand-section::after {
        display: none;
    }

    .login-title {
        font-size: 1.5rem;
    }
}