:root {
    --primary: #00d2ff;
    --secondary: #3a7bd5;
    --glass: rgba(15, 23, 42, 0.85);
    --border: rgba(255, 255, 255, 0.1);
    --text: #f8fafc;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0; padding: 0;
    color: var(--text);
    min-height: 100vh;
    display: flex; flex-direction: column; align-items: center;
    background-size: cover; background-position: center;
    background-attachment: fixed;
}

.main-header { text-align: center; padding: 40px 20px; width: 100%; box-sizing: border-box; }
.main-header h1 { 
    font-size: 2.5rem; font-weight: 800; margin: 0;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.container { width: 90%; max-width: 480px; flex-grow: 1; display: flex; flex-direction: column; gap: 15px; }

.bio-btn {
    display: block; background: var(--glass); color: white;
    text-decoration: none; text-align: center; padding: 18px;
    border-radius: 16px; font-weight: 600; transition: 0.3s;
    border: 1px solid var(--border); backdrop-filter: blur(10px);
}

.card-section {
    background: var(--glass); padding: 25px; border-radius: 24px;
    border: 1px solid var(--border); backdrop-filter: blur(15px);
}

input, textarea, select {
    width: 100%; padding: 14px; margin: 8px 0 20px 0;
    border-radius: 12px; border: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.3); color: white;
    font-size: 1rem; box-sizing: border-box;
}

.btn-send {
    background: var(--primary); color: #0f172a; border: none;
    padding: 16px; width: 100%; border-radius: 12px;
    font-weight: 800; cursor: pointer; text-transform: uppercase;
}

.main-footer { width: 100%; padding: 30px; text-align: center; font-size: 0.8rem; opacity: 0.7; }