/* Login Page CSS - Agent Style */

.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-default) 0%, rgba(33, 150, 243, 0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.login-container {
    width: 100%;
    max-width: 400px;
    animation: fadeIn 0.5s ease-in-out;
}

.login-card {
    background-color: var(--bg-paper);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-heavy);
    border: 1px solid var(--divider);
}

/* 登入标题區域 */
.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-icon {
    width: 64px;
    height: 64px;
    background-color: var(--agent-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    position: relative;
}

.login-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--agent-primary), var(--info));
    opacity: 0.2;
    z-index: -1;
}

.login-icon .material-icons {
    color: white;
    font-size: 32px;
}

.login-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs);
}

.login-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

/* 表單样式 */
.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.input-container {
    position: relative;
    display: flex;
    align-items: center;
}

.input-container .material-icons {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 20px;
    z-index: 1;
}

.input-container input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 48px;
    background-color: var(--bg-surface);
    border: 1px solid var(--divider);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s ease-in-out;
}

.input-container input:focus {
    border-color: var(--agent-primary);
    box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.2);
    outline: none;
}

.input-container input::placeholder {
    color: var(--text-disabled);
}

/* 密码可見性切换 */
.toggle-password {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    transition: all 0.2s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    z-index: 1;
}

.toggle-password:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.toggle-password .material-icons {
    font-size: 20px;
}

/* 登入按钮 */
.login-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(45deg, var(--agent-primary), #1976D2);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    position: relative;
    overflow: hidden;
    gap: var(--spacing-sm);
    min-height: 48px;
}

.login-button:hover {
    background: linear-gradient(45deg, #1976D2, #1565C0);
    box-shadow: var(--shadow-medium);
    transform: translateY(-1px);
}

.login-button:active {
    transform: translateY(0);
}

.login-button:disabled {
    background: var(--bg-surface);
    color: var(--text-disabled);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.login-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease-in-out;
}

.login-button:hover::before {
    left: 100%;
}

.button-text {
    display: flex;
    align-items: center;
}

/* 错误消息样式 */
.error-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid rgba(244, 67, 54, 0.3);
    border-radius: var(--border-radius-sm);
    color: var(--error);
    font-size: 14px;
    margin-bottom: var(--spacing-md);
    animation: fadeIn 0.3s ease-in-out;
}

.error-message .material-icons {
    font-size: 18px;
}

/* 響應式設計 */
@media (max-width: 767px) {
    .login-container {
        max-width: 100%;
        padding: 0;
    }

    .login-card {
        padding: var(--spacing-lg);
        padding-bottom: calc(var(--spacing-lg) + 15vh); /* 為手機版底部預留空間 */
        margin: var(--spacing-md);
        border-radius: var(--border-radius-md);
    }

    .login-title {
        font-size: 22px;
    }

    .input-container input {
        padding: var(--spacing-md) var(--spacing-sm) var(--spacing-md) 44px;
    }

    .login-button {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .login-page {
        padding: var(--spacing-sm);
    }

    .login-card {
        padding: var(--spacing-md);
        padding-bottom: calc(var(--spacing-md) + 15vh); /* 為手機版底部預留更多空間 */
        margin: 0;
    }

    .login-title {
        font-size: 20px;
    }

    .login-subtitle {
        font-size: 13px;
    }
}

/* Safari iOS 底部安全區域支援 */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    @media (max-width: 767px) {
        .login-card {
            padding-bottom: calc(var(--spacing-lg) + 15vh + env(safe-area-inset-bottom, 20px));
        }
    }

    @media (max-width: 480px) {
        .login-card {
            padding-bottom: calc(var(--spacing-md) + 15vh + env(safe-area-inset-bottom, 30px));
        }
    }
}

/* 输入框验证状态 */
.input-container input:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--error);
}

.input-container input:valid:not(:placeholder-shown) {
    border-color: var(--success);
}

/* 加载状态 */
.loading .login-button {
    pointer-events: none;
}

.loading .button-text {
    opacity: 0;
}

.loading .login-button::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* 焦點管理 */
.login-form:focus-within .input-container:focus-within {
    transform: scale(1.02);
}

/* 高對比模式支援 */
@media (prefers-contrast: high) {
    .login-card {
        border: 2px solid var(--border-light);
    }
    
    .input-container input:focus {
        border-width: 2px;
    }
}