:root {
    --primary-color: #1b3673;
    --accent-color: #5bc0de;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --white: #ffffff;
}

body {
    background: var(--bg-light);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.header {
    background: var(--primary-color);
    padding: 1.5rem 0;
    position: relative;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color) 0%, var(--primary-color) 100%);
}

.header-logo {
    height: 110px;
    margin-bottom: 1rem;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.header-title {
    color: var(--white);
    font-size: 1.75rem;
    margin: 0;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.header-address {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    margin: 0.5rem 0 0;
}

.main-content {
    min-height: calc(100vh - 120px);
    padding: 3rem 0;
    background: linear-gradient(135deg, #f6f7f9 0%, #ffffff 100%);
}

.registration-title {
    margin-bottom: 2.5rem;
}

.registration-title h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 0;
    color: var(--text-dark);
    line-height: 1.1;
    letter-spacing: -0.05em;
}

.registration-title h2 {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 0;
    background: linear-gradient(135deg, var(--accent-color) 0%, #2C5282 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
    letter-spacing: -0.05em;
}

.registration-title p {
    font-size: 1.125rem;
    margin-top: 1rem;
    color: var(--text-light);
    font-weight: 500;
}

.notice-section {
    background: var(--primary-color);
    padding: 2rem;
    border-radius: 1rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.notice-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 30%;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 100%);
    transform: skewX(-15deg);
}

.notice-section h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    position: relative;
}

.notice-section p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    line-height: 1.7;
    font-size: 0.95rem;
}

.login-section {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.login-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color) 0%, var(--primary-color) 100%);
}

.form-control {
    height: 3.5rem;
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: 0.75rem;
    padding: 0 1.25rem;
    margin-bottom: 1rem;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(91, 192, 222, 0.2);
    background: var(--white);
}

.form-control::placeholder {
    color: var(--text-light);
}

.forgot-password {
    color: var(--text-light);
    text-align: right;
    display: block;
    margin: 1rem 0 1.5rem;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

.forgot-password:hover {
    color: var(--accent-color);
}

.btn {
    height: 3.5rem;
    padding: 0 2rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 140px;
}

.btn-login {
    background: var(--primary-color);
    color: var(--white);
    border: none;
}

.btn-login:hover {
    background: #152a5a;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-signup {
    background: var(--accent-color);
    color: var(--white);
    border: none;
}

.btn-signup:hover {
    background: #4aa8c9;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.text-danger {
    color: #e53e3e;
    font-size: 0.875rem;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    display: block;
}

@media (max-width: 768px) {
    .header-title {
        font-size: 1.5rem;
    }
    
    .header-address {
        font-size: 0.75rem;
    }
    
    .registration-title h1,
    .registration-title h2 {
        font-size: 2.5rem;
    }
    
    .notice-section,
    .login-section {
        padding: 1.5rem;
    }
    
    .btn {
        min-width: 120px;
        padding: 0 1.5rem;
    }
}

.register-form {
    padding: 2.5rem;
}

.form-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    text-align: center;
}

.gmail-help {
    text-align: center;
    margin: 1rem 0;
    font-size: 0.875rem;
    color: var(--text-light);
}

.create-gmail {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.create-gmail:hover {
    color: #4aa8c9;
    text-decoration: underline;
}

/* Add these to your existing CSS */
.form-control {
    background: rgba(247, 250, 252, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid #e2e8f0;
}

.form-control:focus {
    background: var(--white);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(91, 192, 222, 0.2);
}

.form-control::placeholder {
    color: #a0aec0;
}

.alert-danger {
    background: #fff5f5;
    border: 1px solid #feb2b2;
    color: #c53030;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-danger .icon {
    color: #c53030;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .register-form {
        padding: 1.5rem;
    }
    
    .form-title {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }
}