:root {
    --primary-color: #2F3944;
    --secondary-color: #84754E;
    --accent-color: #996A4E;
    --light-accent: #C69B80;
    --text-light: #FCF9EA;
    --text-dark: #2F3944;
    --transition-speed: 0.3s;
}

body {
    background: linear-gradient(rgba(47, 57, 68, 0.85), rgba(47, 57, 68, 0.85)), url("/sjx/images/background.jpg");
    background-size: cover;
    background-position: center;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    margin: 0;
    padding: 0;
    /* 不要用 flex 置中 body，會導致內容無法上下置中 */
}

.logo-container img {
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 4px 24px rgba(0,0,0,0.18));
}

.card {
    background: rgba(252, 249, 234, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 18px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    border: 1px solid rgba(255,255,255,0.18);
    transition: box-shadow var(--transition-speed);
    z-index: 10 !important;
}

.card-body {
    padding: 2.5rem 2rem 2rem 2rem;
    z-index: 10 !important;
}

.card-footer {
    background: transparent;
    border-top: 1px solid var(--accent-color);
    border-radius: 0 0 18px 18px;
    padding: 1rem 2rem;
}

.form-label {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}

.input-group-text {
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 8px 0 0 8px;
}

.form-control {
    background: rgba(255,255,255,0.95) !important;
    border: 2px solid var(--primary-color) !important;
    color: var(--primary-color) !important;
    border-radius: 0 8px 8px 0 !important;
    padding: 0.9rem 1.2rem 0.9rem 1rem !important;
    font-size: 1.05rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    z-index: 10 !important;
}

.form-control:focus {
    border-color: var(--accent-color) !important;
    box-shadow: 0 0 0 4px rgba(153, 106, 78, 0.18) !important;
}

.btn-primary {
    background: var(--accent-color) !important;
    border: none !important;
    padding: 1rem 2rem;
    font-weight: 700;
    border-radius: 8px;
    font-size: 1.1rem;
    transition: background var(--transition-speed);
    z-index: 10 !important;
}

.btn-primary:hover {
    background: var(--light-accent) !important;
}

.btn {
    color: #fff !important;
    font-weight: 600;
    border-radius: 8px !important;
    padding: 0.8rem 1.5rem !important;
    margin-bottom: 0.5rem;
    transition: background var(--transition-speed);
    z-index: 10 !important;
}

.link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed);
}

.link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.text-danger {
    color: #dc3545 !important;
    font-weight: 600;
    margin-top: 0.5rem;
}

.wrapper {
    min-height: 100vh;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-direction: column;
    padding: 0 !important;
}

@media (max-width: 600px) {
    .card-body, .card-footer {
        padding: 1rem !important;
    }
    .logo-container img {
        width: 180px !important;
        height: auto !important;
    }
    /* 強化選擇器，確保覆蓋 Bootstrap */
    .community-login-row,
    .d-flex.justify-content-between.gap-2,
    .d-flex.justify-content-between.gap-2.flex-fill {
        flex-direction: column !important;
        gap: 0.7rem !important;
        align-items: stretch !important;
        width: 100% !important;
    }
    .community-login-row .btn,
    .d-flex.justify-content-between.gap-2 .btn,
    .d-flex.justify-content-between.gap-2 .btn-light {
        width: 100% !important;
        margin-bottom: 0 !important;
        font-size: 1.08rem !important;
        justify-content: center !important;
        display: flex !important;
        align-items: center !important;
    }
    .text-center.my-3 span {
        font-size: 0.98rem;
        display: block;
        white-space: normal;
    }
    .community-login-row {
        display: flex !important;
        flex-direction: column !important;
        gap: 0.7rem !important;
        align-items: stretch !important;
        width: 100% !important;
    }
    .community-login-row > .btn,
    .community-login-row > .btn-light {
        width: 100% !important;
        margin-bottom: 0 !important;
        font-size: 1.08rem !important;
        justify-content: center !important;
        display: flex !important;
        align-items: center !important;
    }
}