:root {
    --primary-color: #1e3a8a;
    --accent-color: #3b82f6;
    --background-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --input-bg: #0f172a;
    --success-color: #10b981;
    --error-color: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
}

.container {
    width: 100%;
    max-width: 480px;
    padding: 20px;
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.logo {
    padding: 24px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.logo h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.accent {
    color: var(--accent-color);
}

.content {
    padding: 32px 24px;
}

h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

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

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

input {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    font-size: 16px;
    transition: all 0.2s ease;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

input::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

.btn-submit {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-submit:hover {
    background-color: #2563eb;
}

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

.error-message {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 16px;
    min-height: 20px;
    text-align: center;
}

.features {
    display: flex;
    border-top: 1px solid var(--border-color);
}

.feature {
    flex: 1;
    padding: 16px;
    text-align: center;
    border-right: 1px solid var(--border-color);
}

.feature:last-child {
    border-right: none;
}

.feature-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.feature-text {
    font-size: 12px;
    color: var(--text-muted);
}

footer {
    margin-top: 40px;
    text-align: center;
    color: var(--text-muted);
    font-size: 12px;
}

@media (max-width: 480px) {
    .container {
        padding: 16px;
    }
    
    .content {
        padding: 24px 16px;
    }
    
    .features {
        flex-direction: column;
    }
    
    .feature {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .feature:last-child {
        border-bottom: none;
    }
}