/* Header & Navigation */
.main-header {
    height: var(--header-height);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.nav-container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link.active {
    color: var(--accent);
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
}

/* Footer */
.main-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* Specific Page Styles */

/* Index - Hero */
.hero-section {
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.15), transparent 40%),
                radial-gradient(circle at bottom left, rgba(6, 182, 212, 0.15), transparent 40%);
    padding-top: var(--header-height);
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--accent);
}

/* Security Cards */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.risk-card {
    border-top: 4px solid var(--danger);
}

.protect-card {
    border-top: 4px solid var(--success);
}

/* Analysis Charts Layout */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.chart-container {
    background: var(--bg-surface);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    height: 400px;
    position: relative;
}

.chart-full {
    grid-column: 1 / -1;
}

/* Contact Form */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    background: var(--bg-surface);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border);
}

.contact-info {
    padding: 4rem;
    background: linear-gradient(135deg, var(--bg-surface), var(--bg-dark));
}

.contact-form {
    padding: 4rem;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text-main);
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* About/Profile */
.profile-header {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin-bottom: 4rem;
}

.profile-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin: 0;
    object-fit: cover;
    border: 4px solid var(--bg-surface);
    box-shadow: 0 0 0 4px var(--primary);
}

.skill-bar {
    height: 10px;
    background: var(--bg-dark);
    border-radius: 5px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 5px;
    width: 0; /* Animated via JS */
    transition: width 1.5s cubic-bezier(0.1, 0.7, 1.0, 0.1);
}

/* Responsive */
@media (max-width: 968px) {
    .menu-toggle { display: block; }
    
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid var(--border);
    }
    
    .nav-links.active {
        transform: translateY(0);
    }

    .hero-content h1 { font-size: 2.5rem; }
    .contact-wrapper { grid-template-columns: 1fr; }
    .chart-grid { grid-template-columns: 1fr; }
    .profile-header { flex-direction: column; text-align: center; }
}