/* --- GLOBAL & AMBIENT STYLES --- */
body { 
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif; 
    margin: 0; 
    padding: 0;
    background: linear-gradient(135deg, #e0eafc 0%, #cfdef3 100%); 
    background-attachment: fixed;
    color: #1d1d1f; 
    -webkit-font-smoothing: antialiased;
}

/* --- GLASSMORPHISM BASE CLASS --- */
.glass-panel {
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.05);
    border-radius: 18px;
}

/* --- NAVIGATION BAR --- */
nav {
    position: sticky; 
    top: 0; 
    z-index: 1000;
    margin: 15px 30px; 
    padding: 12px 30px;
    display: flex; 
    justify-content: space-between; 
    align-items: center;
}
.nav-logo { 
    font-size: 20px; 
    font-weight: 700; 
    letter-spacing: -0.5px; 
    color: #1d1d1f; 
    text-decoration: none; 
}
.nav-links { display: flex; gap: 25px; align-items: center; }
.nav-link { 
    font-size: 14px; 
    font-weight: 600; 
    color: #555; 
    text-decoration: none;
    transition: color 0.2s, background 0.2s; 
    padding: 8px 12px; 
    border-radius: 8px;
}
.nav-link:hover { 
    color: #000; 
    background: rgba(0,0,0,0.05); 
}
.nav-link.active { 
    color: #007aff; 
    background: rgba(0, 122, 255, 0.1); 
}

/* --- BUTTONS --- */
.btn-primary {
    background: #007aff; 
    color: white; 
    padding: 16px 32px; 
    border-radius: 30px;
    font-size: 16px; 
    font-weight: 600; 
    border: none; 
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3); 
    transition: transform 0.2s, background 0.2s;
}
.btn-primary:hover { 
    transform: translateY(-2px); 
    background: #005bb5; 
}

/* --- TYPOGRAPHY & LAYOUT UTILITIES --- */
.container { 
    max-width: 1000px; 
    margin: 60px auto; 
    padding: 0 30px; 
}
.hero-text { text-align: center; margin-bottom: 60px; }
h1 { font-size: 56px; font-weight: 800; letter-spacing: -1.5px; margin-bottom: 20px; line-height: 1.1; }
h2 { font-size: 32px; font-weight: 700; letter-spacing: -0.8px; margin-bottom: 15px; }
p { font-size: 18px; color: #555; line-height: 1.6; margin-bottom: 30px; }

/* --- FORMS (For Survey) --- */
.form-group { margin-bottom: 20px; }
label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 14px; }
input[type="text"], input[type="number"], select {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid rgba(0,0,0,0.1);
    background: rgba(255,255,255,0.5);
    font-size: 16px;
    font-family: inherit;
    box-sizing: border-box;
}
input:focus, select:focus { outline: none; border-color: #007aff; background: #fff; }