/* =========================================
           1. Global Variables & Reset (全局变量)
           ========================================= */




/* =========================================
           2. Navbar (复用通用导航)
           ========================================= */


/* =========================================
           3. Login Container (登录卡片)
           ========================================= */
.container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    padding-top: 150px;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    text-align: center;
}

.auth-title {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 30px;
    color: var(--text-main);
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    outline: none;
    transition: all 0.3s;
    font-size: 14px;
}

    .form-input:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
    }

.btn-submit {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 10px;
}

    .btn-submit:hover {
        background-color: var(--primary-hover);
    }

    .btn-submit:disabled {
        opacity: 0.7;
        cursor: not-allowed;
    }

.auth-links {
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

/* Social Login */
.divider {
    margin: 30px 0;
    position: relative;
    text-align: center;
}

    .divider::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 0;
        right: 0;
        height: 1px;
        background: var(--border-color);
    }

    .divider span {
        position: relative;
        background: var(--bg-card);
        padding: 0 10px;
        color: var(--text-secondary);
        font-size: 12px;
    }

.social-btns {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-body);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

    .social-btn:hover {
        background: var(--border-color);
    }

    .social-btn svg {
        width: 20px;
        height: 20px;
    }

.msg-box {
    padding: 10px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 20px;
    display: none;
}

.msg-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.msg-success {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.7);
    z-index: 10;
    display: none;
    justify-content: center;
    align-items: center;
    border-radius: 16px;
}

body.dark .loading-overlay {
    background: rgba(0,0,0,0.7);
}

.spinner {
    width: 30px;
    height: 30px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}