/* =========================================
       Base & Fallback Variables
    ========================================= */
:root {
    --color-brand: #0f172a;
    --color-brand-light: #1e293b;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-accent-light: #eff6ff;
    --color-bg-page: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-text-main: #334155;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --font-main: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;
}

body {
    font-family: var(--font-main);
    color: var(--color-text-main);
    background-color: var(--color-bg-page);
    margin: 0;
    line-height: 1.6;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-brand);
    margin-top: 0;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.section-alt {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

/* =========================================
       Hero Section
    ========================================= */
.hero {
    padding: 7rem 0 6rem;
    background: linear-gradient(135deg, var(--color-brand) 0%, #1e3a6e 100%);
    color: #ffffff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: #ffffff;
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

.hero p {
    color: rgba(255, 255, 255, .8);
    font-size: 1.15rem;
    max-width: 680px;
    margin: 0 auto 2.5rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 0;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: var(--font-mono);
    background-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.2s ease;
}

.tag:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

/* =========================================
       Projects Grid & Cards
    ========================================= */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.featured-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.project-card {
    background: var(--color-bg-page);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: var(--color-accent);
}

.card-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background-color: var(--color-accent-light);
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.project-card:hover .card-icon-wrapper {
    background-color: var(--color-accent);
    color: #ffffff;
}

.project-card h3 {
    font-size: 1.25rem;
    margin: 0;
}

.project-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
    margin: 0;
}

.card-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: -0.5rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-top: 1rem;
    transition: gap 0.2s ease, color 0.2s ease;
}

.project-card:hover .project-link {
    gap: 0.75rem;
    color: var(--color-accent-hover);
}

/* =========================================
       Contact Section
    ========================================= */
.contact-wrapper {
    text-align: center;
    max-width: 620px;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin: 2.5rem 0;
}

.contact-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-brand);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background-color: var(--color-bg-page);
    transition: all 0.2s ease;
}

.contact-links a:hover {
    border-color: var(--color-accent);
    background-color: var(--color-accent-light);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 1.1rem;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-page);
    transition: all 0.2s ease;
}

.social-icons a:hover {
    color: #ffffff;
    border-color: var(--color-accent);
    background-color: var(--color-accent);
    transform: translateY(-3px);
}

/* =========================================
       Responsive Design
    ========================================= */
@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }

    .hero {
        padding: 5rem 0 4rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .contact-links {
        flex-direction: column;
        align-items: stretch;
    }
}