/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
    background: white;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    padding: 1.5rem 0;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-logo {
    height: 3rem;
    width: 3rem;
}

.navbar-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #111827;
}

.navbar-subtitle {
    font-size: 0.875rem;
    color: #6b7280;
}

.btn-cv {
    padding: 0.5rem 1.5rem;
    background: #374151;
    color: white;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: 0.375rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-cv:hover {
    background: #1f2937;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    justify-content: center;
    gap: 2rem;
    border-bottom: 1px solid #e5e7eb;
}

.nav-link {
    padding: 0.75rem 1rem;
    color: #6b7280;
    text-decoration: none;
    position: relative;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link:hover {
    color: #111827;
}

.nav-link.active {
    color: #374151;
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: #374151;
    border-radius: 2px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
    padding: 8rem 0;
}

.hero-logo {
    height: 8rem;
    width: 8rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 400;
    color: #111827;
    line-height: 1;
    margin-bottom: 2rem;
}

.hero-description {
    font-size: 1.25rem;
    color: #4b5563;
    margin: 0 auto 4rem;
    max-width: 48rem;
    line-height: 1.75;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn-primary {
    padding: 0.75rem 2rem;
    background: #374151;
    color: white;
    font-weight: 600;
    border-radius: 0.375rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: #1f2937;
}

.btn-secondary {
    padding: 0.75rem 2rem;
    background: white;
    color: #374151;
    font-weight: 600;
    border: 2px solid #374151;
    border-radius: 0.375rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #374151;
    color: white;
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */

.content-section {
    padding: 4rem 0;
}

.section-header {
    margin-bottom: 4rem;
}

.section-header h1 {
    font-size: 2.25rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 1.25rem;
}

.section-header p {
    font-size: 1rem;
    color: #6b7280;
}

/* ============================================
   PROJECT CARDS
   ============================================ */

.project-card {
    margin-bottom: 8rem;
}

.project-header {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.project-number {
    font-size: 2.25rem;
    color: #374151;
    font-weight: 400;
    flex-shrink: 0;
}

.project-info {
    flex: 1;
}

.project-title {
    font-size: 1.875rem;
    font-weight: 400;
    color: #374151;
    margin-bottom: 1rem;
}

.project-description {
    font-size: 1rem;
    color: #6b7280;
    line-height: 1.75;
    margin-bottom: 1rem;
}

.project-features {
    background: #f9fafb;
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin: 1.5rem 0;
}

.project-features h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #374151;
    margin-bottom: 1rem;
}

.project-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.project-features li {
    display: flex;
    gap: 0.5rem;
    color: #4b5563;
    margin-bottom: 0.5rem;
    line-height: 1.75;
}

.project-features li::before {
    content: '✓';
    color: #10b981;
    font-weight: bold;
    flex-shrink: 0;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 2rem 0;
}

.tag {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
}

.tag-red { background: #fee2e2; color: #991b1b; }
.tag-purple { background: #f3e8ff; color: #6b21a8; }
.tag-blue { background: #dbeafe; color: #1e40af; }
.tag-cyan { background: #cffafe; color: #155e75; }
.tag-gray { background: #e5e7eb; color: #1f2937; }
.tag-yellow { background: #fef3c7; color: #92400e; }
.tag-green { background: #d1fae5; color: #065f46; }
.tag-orange { background: #fed7aa; color: #9a3412; }

/* ============================================
   DEMO CONTAINER
   ============================================ */

.demo-container {
    background: #1f2937;
    border-radius: 0.5rem;
    padding: 1rem;
}

.demo-header {
    font-family: monospace;
    font-size: 0.875rem;
    color: #9ca3af;
    margin-bottom: 0.75rem;
}

.demo-status {
    color: #10b981;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    padding: 4rem 0;
    background: white;
    border-top: 1px solid #e5e7eb;
}

.footer-title {
    font-size: 2.25rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 1.25rem;
}

.footer-description {
    font-size: 1rem;
    color: #6b7280;
    margin-bottom: 3rem;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.social-link {
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    transition: all 0.3s ease;
    color: #6b7280;
}

.social-link:hover {
    background: #f3f4f6;
    color: #374151;
}

.footer-copyright {
    font-size: 0.875rem;
    color: #9ca3af;
}

/* ============================================
   PLACEHOLDERS
   ============================================ */

.placeholder {
    text-align: center;
    padding: 4rem 0;
    color: #9ca3af;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .navbar-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-tabs {
        gap: 1rem;
        overflow-x: auto;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .project-header {
        flex-direction: column;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */

html {
    scroll-behavior: smooth;
}

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

.project-card {
    animation: fadeIn 0.6s ease-out;
}