/* =========================
   Login Page Custom Style
   ========================= */

/* 登入頁最外層樣式 */
.login-page {
    font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
    background: none; /* 移除藍色漸層 */
    min-height: calc(100vh - 120px); /* 預留 header/footer 高度 */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px 0;
}


/* 避免被 base.html 的 main 限制 */
main {
    padding: 0 !important;
    margin: 0 !important;
    max-width: 100% !important;
    background: transparent !important;
}

/* 登入容器 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

/* 登入卡片 */
.login-card {
    background: #ffffff;
    padding: 50px 60px;        /* 增加內距 */
    border-radius: 20px;       /* 更柔和圓角 */
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
    width: 420px;              /* 原本是 360px，改寬一點 */
    max-width: 90%;            /* 手機仍能自動縮放 */
    transition: all 0.3s ease;
}

.login-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.2);
}

/* 標題 */
.login-card h1 {
    text-align: center;
    color: #1e3a8a;
    margin-bottom: 30px;
    font-size: 30px;
    font-weight: 700;
}

/* 標籤與輸入框 */
label {
    display: block;
    font-weight: 600;
    color: #374151;
    margin-bottom: 6px;
    text-align: left;
}

input[type="text"], input[type="password"] {
    width: 100%;
    padding: 14px;             /* 增加輸入框高度 */
    margin-bottom: 22px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;        /* 較圓角 */
    font-size: 16px;           /* 放大字體 */
    transition: 0.3s;
}

input[type="text"]:focus, input[type="password"]:focus {
    border-color: #3b82f6;
    outline: none;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.3);
}

/* 按鈕 */
.btn-submit {
    width: 100%;
    background: #3b82f6;
    color: white;
    font-size: 17px;           /* 放大字體 */
    padding: 14px;             /* 增加按鈕高度 */
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s;
}

.btn-submit:hover {
    background: #2563eb;
    transform: scale(1.02);    /* 小小放大特效 */
}

/* 註冊連結 */
.back-link {
    text-align: center;
    margin-top: 20px;
}

.back-link a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.back-link a:hover {
    color: #1d4ed8;
}

/* Flash 訊息 */
.flash-container {
    position: fixed;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 1000;
}

.flash-success {
    background: #dcfce7;
    color: #166534;
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid #86efac;
    margin-bottom: 8px;
}

.flash-error {
    background: #fee2e2;
    color: #991b1b;
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid #fca5a5;
    margin-bottom: 8px;
}

/* ============================================================
   📱 手機響應式設計 (Mobile Responsive)
   ============================================================ */
@media (max-width: 768px) {
    .login-page {
        padding: 30px 0;
        min-height: calc(100vh - 80px);
    }

    .login-card {
        width: 95%;
        max-width: 100%;
        padding: 30px 25px;
        border-radius: 15px;
    }

    .login-card h1 {
        font-size: 24px;
        margin-bottom: 20px;
    }

    label {
        font-size: 0.95rem;
        margin-bottom: 5px;
    }

    input[type="text"],
    input[type="password"] {
        padding: 12px;
        margin-bottom: 18px;
        font-size: 16px;
        border-radius: 6px;
    }

    .btn-submit {
        padding: 12px;
        font-size: 16px;
        border-radius: 6px;
    }

    .error-message {
        font-size: 0.9rem;
        padding: 8px 15px;
    }
}

@media (max-width: 480px) {
    .login-page {
        padding: 20px 0;
    }

    .login-card {
        width: 100%;
        padding: 20px 15px;
        margin: 0 10px;
        border-radius: 12px;
    }

    .login-card h1 {
        font-size: 20px;
        margin-bottom: 15px;
    }

    label {
        font-size: 0.9rem;
        margin-bottom: 4px;
    }

    input[type="text"],
    input[type="password"] {
        padding: 10px;
        margin-bottom: 15px;
        font-size: 16px;
    }

    .btn-submit {
        padding: 10px;
        font-size: 15px;
    }

    .error-message {
        font-size: 0.85rem;
        padding: 6px 12px;
    }
}