:root {
    --navy-main: #0f2850;
    --navy-dark: #0c1f3d;
    --navy-soft: #1e3a8a;
    --text-dark: #1f2937;
    --text-muted: #6b7280;
    --bg-light: #f3f4f6;
    --white: #ffffff;
    --error: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy-main) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
    padding: 20px;
    animation: fadeIn 0.8s ease-out;
}

.login-title {
    margin-bottom: 25px;
    font-weight: 700;
    color: var(--white);
    text-align: center;
    font-size: 24px;
    letter-spacing: -0.5px;
}

.login-card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, var(--navy-soft), var(--navy-dark));
}

.login-logo {
    display: block;
    max-width: 180px;
    margin: 0 auto 30px auto;
}

.login-card h3 {
    margin-bottom: 30px;
    font-weight: 600;
    color: var(--text-dark);
    text-align: center;
    font-size: 20px;
}

.input-group {
    margin-bottom: 24px;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid #e5e7eb;
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    background-color: #f9fafb;
}

.input-group input:focus {
    border-color: var(--navy-main);
    outline: none;
    background-color: var(--white);
    box-shadow: 0 0 0 4px rgba(15, 40, 80, 0.1);
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: var(--navy-main);
    border: none;
    border-radius: 12px;
    color: var(--white);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.login-btn:hover {
    background: var(--navy-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(15, 40, 80, 0.3);
}

.login-extra {
    margin-top: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--text-muted);
}

.login-extra input[type="checkbox"] {
    margin-right: 6px;
}

.login-extra a {
    text-decoration: none;
    color: var(--navy-main);
    font-weight: 500;
}

.login-extra a:hover {
    text-decoration: underline;
}

.error {
    background-color: #fef2f2;
    color: var(--error);
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 25px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    border: 1px solid #fee2e2;
}

.back-wrapper {
    margin-top: 35px;
    text-align: center;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.back-btn:hover {
    color: var(--white);
    transform: translateX(-5px);
}

.back-btn i {
    margin-right: 8px;
}

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

@media (max-width: 480px) {
    .login-card {
        padding: 30px 20px;
    }
}