/* ========== Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body.auth-page {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans KR", sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e9f2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* ========== Container ========== */
.auth-container {
    width: 100%;
    max-width: 420px;
}

/* ========== Login Box ========== */
.login-box {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 40px;
    animation: fadeInUp 0.4s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== Header ========== */
.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo-img {
    max-width: 180px;
    height: auto;
}

.logo-text {
    font-size: 32px;
    font-weight: 700;
    color: #1a73e8;
    letter-spacing: -0.5px;
}

/* ========== Alert ========== */
.alert {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 14px;
    line-height: 1.5;
}

.alert-error {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.alert-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ========== Form ========== */
.login-form {
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #374151;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    transition: all 0.2s ease;
    background: #ffffff;
}

.form-input:focus {
    outline: none;
    border-color: #1a73e8;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.form-input::placeholder {
    color: #9ca3af;
}

/* ========== Button ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-primary {
    background: #1a73e8;
    color: #ffffff;
}

.btn-primary:hover {
    background: #1557b0;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

.btn-primary:active {
    transform: translateY(1px);
}

.btn-block {
    width: 100%;
}

/* ========== Footer ========== */
.login-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #e5e7eb;
}

.copyright {
    font-size: 13px;
    color: #6b7280;
}

/* ========== Responsive ========== */
@media (max-width: 480px) {
    .login-box {
        padding: 30px 24px;
    }
    
    .logo-text {
        font-size: 28px;
    }
    
    .form-input {
        padding: 10px 14px;
        font-size: 16px; /* iOS zoom 방지 */
    }
    
    .btn {
        padding: 11px 20px;
    }
}

@media (max-width: 360px) {
    .auth-container {
        padding: 10px;
    }
    
    .login-box {
        padding: 24px 20px;
    }
}

/* ========== Dark Mode Support ========== */
@media (prefers-color-scheme: dark) {
    body.auth-page {
        background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    }
    
    .login-box {
        background: #1f2937;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
    
    .logo-text {
        color: #60a5fa;
    }
    
    .form-label {
        color: #e5e7eb;
    }
    
    .form-input {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }
    
    .form-input:focus {
        border-color: #60a5fa;
        box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
    }
    
    .form-input::placeholder {
        color: #9ca3af;
    }
    
    .login-footer {
        border-top-color: #374151;
    }
    
    .copyright {
        color: #9ca3af;
    }
}