@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@100..900&display=swap");

:root {
    --primary: #0066cc;
    --primary-hover: #0077ed;
    --primary-active: #004b97;
    --background: #ffffff;
    --surface: #f5f5f7;
    --border: #d2d2d7;
    --text: #1d1d1f;
    --text-secondary: #86868b;
    --error: #ff3b30;
    --success: #34c759;
    --warning: #ff9500;
    --radius: 12px;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

* {
    font-family: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--background);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

.box {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f5f5f7 0%, #ffffff 100%);
}

.L_container {
    width: 360px;
    display: flex;
    flex-direction: column;
    padding: 40px 30px;
    border-radius: var(--radius);
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04), 0 6px 12px rgba(0, 0, 0, 0.02);
    animation: fadeIn 0.5s ease-out;
    transition: var(--transition);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

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

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 32px;
}

.login-logo {
    color: var(--primary);
    width: 60px;
    height: 60px;
}

.brand-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text);
    margin-top: 12px;
    letter-spacing: -0.02em;
}

.L-header {
    margin-bottom: 28px;
    text-align: left;
}

header {
    color: var(--text);
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.login-field {
    margin-bottom: 16px;
}

    .login-field:last-of-type {
        margin-top: 28px;
    }

.input-container {
    position: relative;
}

.login-input {
    height: 50px;
    width: 100%;
    border: none;
    outline: none;
    border-radius: var(--radius);
    color: var(--text);
    padding: 0 16px;
    background-color: var(--surface);
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 400;
    border: 1px solid transparent;
}

    .login-input:focus {
        background-color: var(--background);
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
    }

::-webkit-input-placeholder {
    color: var(--text-secondary);
}

.login-submit {
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    height: 50px;
    outline: none;
    width: 100%;
    background-color: var(--primary);
    color: white;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

    .login-submit:active {
        background-color: var(--primary-active);
        transform: scale(0.98);
    }

    .login-submit:disabled {
        opacity: 0.6;
        cursor: not-allowed;
        background-color: var(--text-secondary);
    }

    .login-submit.active {
        opacity: 1;
        cursor: pointer;
        background-color: var(--primary);
    }

    .login-submit.loading {
        background-color: var(--primary);
        cursor: wait;
    }

        .login-submit.loading::after {
            content: "";
            position: absolute;
            width: 20px;
            height: 20px;
            top: 50%;
            left: 50%;
            margin-left: -30px;
            margin-top: -10px;
            border: 2px solid rgba(255, 255, 255, 0.5);
            border-radius: 50%;
            border-top-color: #fff;
            animation: spin 0.8s linear infinite;
        }

    .login-submit.success {
        background-color: var(--success);
    }

    .login-submit.error {
        background-color: var(--error);
    }

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

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

.L-bottom {
    display: flex;
    margin-top: 16px;
    align-items: center;
}

.login-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background-color: var(--surface);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    outline: none;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
}

    input[type="checkbox"]:checked {
        background-color: var(--primary);
        border-color: var(--primary);
    }

        input[type="checkbox"]:checked::after {
            content: "";
            position: absolute;
            width: 5px;
            height: 10px;
            border: 2px solid white;
            border-width: 0 2px 2px 0;
            transform: rotate(45deg) translateY(-1px);
        }

    input[type="checkbox"]:hover {
        border-color: var(--primary);
    }

label {
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.input-container.focused {
    transform: translateY(-2px);
}

.error-message {
    color: var(--error);
    font-size: 0.9rem;
    margin-bottom: 16px;
    padding: 8px 12px;
    border-radius: var(--radius);
    background-color: rgba(255, 59, 48, 0.08);
    animation: fadeIn 0.3s ease-out;
}

/* 다크 모드 지원 */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #1d1d1f;
        --surface: #2c2c2e;
        --border: #3d3d41;
        --text: #f5f5f7;
        --text-secondary: #98989d;
    }

    body {
        background: var(--background);
    }

    .box {
        background: linear-gradient(135deg, #1d1d1f 0%, #000000 100%);
    }

    .L_container {
        background-color: rgba(40, 40, 42, 0.8);
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    }

    .login-input {
        background-color: rgba(255, 255, 255, 0.06);
    }

        .login-input:focus {
            background-color: rgba(255, 255, 255, 0.08);
        }

    input[type="checkbox"] {
        background-color: rgba(255, 255, 255, 0.06);
        border-color: var(--border);
    }

        input[type="checkbox"]:hover {
            border-color: var(--primary);
        }
}