:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-gradient-start: rgba(15, 23, 42, 0.98);
    --bg-gradient-end: #0f172a;
    --text-primary: #cbd5e1;
    --text-secondary: #94a3b8;
    --text-heading: #f1f5f9;
    --border-primary: #334155;
    --highlight-amber: #f59e0b;
    --header-bg: rgba(15, 23, 42, 0.8);
    --modal-bg: #1e293b;
    --image-filter: none;
    --whatsapp-green: #25D366;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-gradient-start: rgba(248, 250, 252, 0.98);
    --bg-gradient-end: #f8fafc;
    --text-primary: #334155;
    --text-secondary: #64748b;
    --text-heading: #0f172a;
    --border-primary: #e2e8f0;
    --highlight-amber: #f59e0b;
    --header-bg: rgba(248, 250, 252, 0.8);
    --modal-bg: #ffffff;
    --image-filter: invert(1);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    background-image: radial-gradient(var(--text-secondary) 0.5px, transparent 0.5px);
    background-size: 20px 20px;
    transition: background-color 0.3s ease, color 0.3s ease;
}
.main-container {
    background: radial-gradient(circle at 20% 20%, var(--bg-gradient-start), var(--bg-gradient-end) 40%);
}
.highlight-amber { color: var(--highlight-amber); }
.text-heading { color: var(--text-heading); }
.cta-button {
    background-color: var(--highlight-amber);
    color: var(--bg-primary);
    transition: all 0.3s ease;
}
.cta-button:hover {
    background-color: #fbbf24;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(245, 158, 11, 0.2);
}
 .whatsapp-button {
    background-color: var(--whatsapp-green);
    color: white;
    transition: all 0.3s ease;
}
.whatsapp-button:hover {
    background-color: #128C7E;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(37, 211, 102, 0.2);
}
.secondary-button {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    transition: all 0.3s ease;
}
.secondary-button:hover {
    background-color: var(--bg-secondary);
    border-color: var(--text-secondary);
}
.project-card, .skill-card, .modal-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    transition: all 0.3s ease;
}
.project-card:hover {
    transform: translateY(-8px) rotateX(5deg);
    border-color: var(--highlight-amber);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
}
.tech-tag {
    background-color: var(--bg-primary);
    color: var(--text-secondary);
}
.section-title::after {
    content: ''; display: block; width: 50px; height: 3px;
    background-color: var(--highlight-amber);
    margin-top: 1rem;
}
.skill-card:hover {
    transform: translateY(-5px);
    border-color: rgba(245, 158, 11, 0.5);
    box-shadow: 0 10px 15px -3px rgba(245, 158, 11, 0.1), 0 4px 6px -2px rgba(245, 158, 11, 0.05);
}
.skill-card img { transition: transform 0.3s ease; }
.skill-card:hover img { transform: scale(1.1); }
.nextjs-logo { filter: var(--image-filter); }

.fade-in-section { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.fade-in-section.is-visible { opacity: 1; transform: translateY(0); }

.modal-backdrop, .modal-content { transition: opacity 0.3s ease, transform 0.3s ease; }

/* Custom Swiper Styles */
.project-carousel-container .swiper-button-next,
.project-carousel-container .swiper-button-prev {
    color: var(--highlight-amber) !important;
}
.project-carousel-container .swiper-pagination-bullet-active {
    background-color: var(--highlight-amber) !important;
}