:root {
    --primary-color: #669bbc;
    --primary-hover: #5287a7;
    --secondary-color: #E9C46A;
    --secondary-hover: #F4A261;
    --accent-color: #ed664b;
    --background-color: #ffffff;
    --surface-color: #ffffff;
    --text-primary: #264653;
    --text-secondary: #2A9D8F;
    --text-placeholder: #b1b1b1;
    --input: #1f1f1f;
}



.container-wrapper {
    position: relative;
    width: 100%;
    height: 60vh;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1500px;
    overflow: hidden;
}

.login-container {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    width: 100%;
    max-width: 320px;
    height: 450px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.login-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
}

.login-container.slide-left {
    transform: translate(50%, -50%);
    opacity: 0;
}

.login-container.slide-right {
    transform: translate(-150%, -50%);
    opacity: 0;
}

.login-container.active {
    transform: translate(-50%, -50%);
    opacity: 1;
}

.form-group {
    margin: 1.5rem 0;
    position: relative;
    width: 100%;
}

    .form-group input {
        width: 100%;
        padding: 1rem 0.75rem;
        border: 2px solid var(--text-placeholder);
        border-radius: 0.5rem;
        font-size: 1rem;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        background-color: transparent;
        box-sizing: border-box;
        color: var(--text-primary);
    }

        .form-group input::placeholder {
            color: transparent;
        }

        .form-group input:focus {
            border-color: var(--primary-color);
            outline: none;
            color: var(--text-primary);
        }

    .form-group label {
        position: absolute;
        left: 0.75rem;
        top: 1rem;
        font-size: 1rem;
        color: var(--text-placeholder);
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        background-color: var(--surface-color);
        padding: 0 0.25rem;
        pointer-events: none;
    }

    .form-group input:focus + label,
    .form-group input:not(:placeholder-shown) + label {
        top: -0.01rem;
        font-size: 0.875rem;
        transform: translateY(-50%);
    }

    /* New styles for label color change */
    .form-group input:focus + label {
        color: var(--primary-color);
    }

    .form-group input:not(:focus):not(:placeholder-shown) + label {
        color: var(--text-placeholder);
    }

/* Rest of the CSS remains unchanged */
.button-group {
    width: 100%;
    margin-top: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}
/* 主按鈕樣式 */
.main-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    width: 100%;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 0.75rem;
    position: relative;
    overflow: hidden;
}

    .main-button::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background-color: rgba(255, 255, 255, 0.2);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        transition: width 0.6s ease, height 0.6s ease;
    }

    .main-button:hover {
        background-color: var(--primary-hover);
        transform: translateY(-2px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }

        .main-button:hover::before {
            width: 300px;
            height: 300px;
        }

    .main-button:active {
        transform: translateY(1px);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .main-button:focus-visible {
        outline: none;
        box-shadow: 0 0 0 3px rgba(102, 155, 188, 0.5);
    }

/* 次要按鈕樣式 */
.secondary-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

    .secondary-button::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--primary-color);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.3s ease;
        z-index: -1;
    }

    .secondary-button:hover {
        color: white;
    }

        .secondary-button:hover::before {
            transform: scaleX(1);
        }

    .secondary-button:focus {
        outline: none;
        box-shadow: 0 0 0 2px rgba(102, 155, 188, 0.3);
    }
/* 選項按鈕樣式 */
.option-button {
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
    position: relative;
    overflow: hidden;
}

    .option-button i {
        margin-right: 0.5rem;
        width: 20px;
        text-align: center;
        transition: transform 0.3s ease;
    }

    .option-button::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background-color: var(--primary-color);
        transition: all 0.5s ease;
        z-index: -1;
    }

    .option-button:hover {
        color: white;
    }

        .option-button:hover::before {
            left: 0;
        }

        .option-button:hover i {
            transform: scale(1.2);
        }

    /*無障礙虛線 css */
    .main-button:focus,
    .secondary-button:focus,
    .option-button:focus {
        outline: 4px dashed var(--secondary-hover);
        box-shadow: none;
    }

.hidden {
    display: none;
}

h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    width: 100%;
    text-align: left;
}

.welcome-message {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    text-align: center;
}

.nickname {
    font-size: 2.2rem;
    font-weight: bold;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

    .nickname:hover {
        transform: scale(1.05);
        text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    }

/* 添加一个简单的动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#stepPassword .login-content {
    animation: fadeIn 0.5s ease-out;
}
/* loading 動畫控制 */
.loader {
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    display: none;
    margin: 5px auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

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

.loader-container {
    text-align: center;
    margin: 10px;
    padding: 10px;
    border-radius: 8px;
}




/* RWD 媒體查詢 */
@media screen and (max-width: 600px) {
    .loader {
        width: 40px;
        height: 40px;
        border-width: 6px;
    }

    button {
        padding: 6px 12px;
        font-size: 12px;
    }
}

@media screen and (min-width: 601px) and (max-width: 1024px) {
    .loader {
        width: 50px;
        height: 50px;
        border-width: 7px;
    }
}