/* ═══════════════════════════════════════════════════════════════════
   Miguel Angel Carvajal — Personal Portfolio
   Premium Dark Theme · Glassmorphism · Micro-animations
   ═══════════════════════════════════════════════════════════════════ */

/* ── Design Tokens ───────────────────────────────────────────────── */
:root {
    --bg-color: #06060e;
    --bg-surface: #0c0c1a;
    --card-bg: rgba(255, 255, 255, 0.035);
    --card-bg-hover: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(139, 92, 246, 0.4);

    --accent-1: #818cf8;          /* Indigo 400 */
    --accent-2: #a78bfa;          /* Violet 400 */
    --accent-3: #c084fc;          /* Purple 400 */
    --accent-glow: rgba(129, 140, 248, 0.2);
    --accent-gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --nav-bg: rgba(6, 6, 14, 0.85);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset & Base ────────────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', 'Outfit', system-ui, sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 2rem 2rem 4rem;
}

/* ── Background Blobs ────────────────────────────────────────────── */
.background-blobs {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 600px 400px at 15% 15%, rgba(129, 140, 248, 0.15) 0%, transparent 70%),
        radial-gradient(ellipse 500px 500px at 85% 75%, rgba(167, 139, 250, 0.12) 0%, transparent 70%),
        radial-gradient(ellipse 400px 300px at 50% 50%, rgba(192, 132, 252, 0.06) 0%, transparent 70%);
    animation: blobDrift 20s ease-in-out infinite alternate;
}

@keyframes blobDrift {
    0%   { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(15deg); }
}

/* ── Navigation ──────────────────────────────────────────────────── */
.glass-nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.2rem 0;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 100;
    border-bottom: 1px solid var(--glass-border);
    transition: padding var(--transition), background var(--transition);
}

.glass-nav.scrolled {
    padding: 0.8rem 0;
    background: rgba(6, 6, 14, 0.95);
}

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

.logo {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    text-decoration: none;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.logo-dot {
    -webkit-text-fill-color: var(--accent-3);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition), background var(--transition);
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
    background: var(--card-bg) !important;
    border: 1px solid var(--glass-border) !important;
    color: var(--accent-1) !important;
    font-weight: 600 !important;
}

.nav-cta:hover {
    border-color: var(--accent-1) !important;
    background: rgba(129, 140, 248, 0.1) !important;
}

.lang-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid var(--glass-border) !important;
    border-radius: var(--radius-sm);
    color: var(--text-secondary) !important;
    font-size: 0.8rem !important;
    font-weight: 600 !important;
    padding: 0.3rem 0.6rem !important;
    margin-left: 0.5rem;
    transition: all var(--transition);
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--text-primary) !important;
    border-color: var(--text-muted) !important;
}

/* ── Hamburger Menu ──────────────────────────────────────────────── */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    z-index: 110;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Hero Section ────────────────────────────────────────────────── */
.hero {
    padding: 11rem 0 6rem;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    background: rgba(129, 140, 248, 0.1);
    border: 1px solid rgba(129, 140, 248, 0.25);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-1);
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2.5rem, 6vw, 4.2rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1.5px;
    line-height: 1.15;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shimmer {
    background-size: 200% auto;
    animation: shimmer 4s linear infinite;
}

@keyframes shimmer {
    0%   { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 400;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.bio {
    max-width: 620px;
    margin: 0 auto 2.5rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

/* ── Buttons ─────────────────────────────────────────────────────── */
.cta-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    cursor: pointer;
}

.btn-icon {
    font-size: 1.1rem;
}

.btn.primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow:
        0 4px 20px rgba(129, 140, 248, 0.3),
        0 0 0 1px rgba(129, 140, 248, 0.2);
}

.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow:
        0 8px 30px rgba(129, 140, 248, 0.4),
        0 0 0 1px rgba(129, 140, 248, 0.3);
}

.btn.secondary {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

.btn.secondary:hover {
    background: var(--card-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-2px);
}

/* ── Section Titles ──────────────────────────────────────────────── */
.section-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    text-align: center;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 3rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ── Project Cards ───────────────────────────────────────────────── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.glass {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.glass::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.05), transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
}

.glass:hover {
    transform: translateY(-6px);
    border-color: var(--glass-border-hover);
    background: var(--card-bg-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.glass:hover::before {
    opacity: 1;
}

.card-content {
    position: relative;
    z-index: 1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.card-icon {
    font-size: 1.8rem;
}

.category {
    font-size: 0.75rem;
    color: var(--accent-2);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 0.25rem 0.75rem;
    background: rgba(167, 139, 250, 0.1);
    border-radius: 100px;
}

.project-card h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 1.5rem;
    color: var(--accent-1);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: gap var(--transition), color var(--transition);
}

.project-link:hover {
    color: var(--accent-2);
    gap: 0.8rem;
}

.project-link .arrow {
    transition: transform var(--transition);
}

.project-link:hover .arrow {
    transform: translateX(4px);
}

/* ── Skills Section ──────────────────────────────────────────────── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.skill-group h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: rgba(255, 255, 255, 0.04);
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    transition: all var(--transition);
    font-weight: 500;
}

.tag:hover {
    border-color: var(--accent-1);
    color: var(--accent-1);
    background: rgba(129, 140, 248, 0.08);
}

/* ── Footer ──────────────────────────────────────────────────────── */
footer {
    padding: 4rem 0 3rem;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--accent-1);
}

.footer-tagline {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Animations ──────────────────────────────────────────────────── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    .subtitle { font-size: 1.1rem; }

    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-surface);
        border-left: 1px solid var(--glass-border);
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        gap: 0.5rem;
        transition: right var(--transition);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 0.8rem 1rem;
        width: 100%;
    }

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

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

    .hero {
        padding: 9rem 0 4rem;
    }

    .cta-group {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 1.2rem;
    }
}