/* ================================================
   CIENCIA ESTELAR — Portfolio de Divulgación Científica
   Estética: Dark cosmic + editorial + cyan/gold accents
   ================================================ */

/* --- VARIABLES --- */
:root {
    --bg-primary: #0a0a12;
    --bg-secondary: #0f0f1a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --cyan: #50d4eb;
    --cyan-dim: rgba(80, 212, 235, 0.15);
    --cyan-glow: rgba(80, 212, 235, 0.3);
    --gold: #d4af37;
    --gold-dim: rgba(212, 175, 55, 0.15);
    --white: #ffffff;
    --text-primary: #e8e6e0;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --text-dim: rgba(255, 255, 255, 0.4);
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, sans-serif;
    --container: 1100px;
    --transition: 0.3s ease;
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- RESET --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- GRAIN OVERLAY --- */
.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 128px 128px;
}

/* --- STARFIELD CANVAS --- */
#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* --- SELECTION --- */
::selection {
    background: var(--cyan);
    color: var(--bg-primary);
}

/* --- SCROLLBAR --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--cyan); border-radius: 3px; }
* { scrollbar-width: thin; scrollbar-color: var(--cyan) var(--bg-primary); }

/* --- FOCUS --- */
*:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
}

*:focus:not(:focus-visible) { outline: none; }

/* --- NAVIGATION --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    z-index: 1000;
    background: rgba(10, 10, 18, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
}

.nav.scrolled {
    padding: 14px 40px;
    background: rgba(10, 10, 18, 0.95);
}

.nav.hidden { transform: translateY(-100%); }

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--cyan);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-star {
    font-size: 1em;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    font-size: 0.8rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    position: relative;
    transition: color var(--transition);
}

.nav-links a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--cyan);
    transition: width var(--transition);
}

.nav-links a:not(.nav-cta):hover {
    color: var(--white);
}

.nav-links a:not(.nav-cta):hover::after {
    width: 100%;
}

.nav-cta {
    border: 1px solid var(--cyan);
    padding: 8px 20px;
    border-radius: 30px;
    color: var(--cyan) !important;
    transition: all var(--transition);
}

.nav-cta:hover {
    background: var(--cyan);
    color: var(--bg-primary) !important;
}

/* Mobile nav */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.nav-toggle span {
    width: 22px;
    height: 1.5px;
    background: var(--cyan);
    transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(4.5px, 4.5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(4.5px, -4.5px); }

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(10, 10, 18, 0.98);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.mobile-menu.active { opacity: 1; visibility: visible; }

.mobile-menu a {
    font-size: 1.4rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-secondary);
    transition: color var(--transition);
}

.mobile-menu a:hover { color: var(--cyan); }

/* --- BUTTONS --- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--cyan);
    color: var(--bg-primary);
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 50px;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--cyan-glow);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    padding: 14px 28px;
    background: transparent;
    color: var(--text-primary);
    font-weight: 400;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 1px solid var(--border);
    border-radius: 50px;
    transition: all var(--transition);
}

.btn-ghost:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
}

/* --- HERO --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 40px 60px;
    z-index: 1;
}

.hero-content {
    max-width: 700px;
}

.hero-label {
    font-size: 0.75rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--cyan);
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -2px;
    color: var(--white);
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero-accent {
    background: linear-gradient(135deg, var(--cyan) 0%, #8bb8e8 50%, var(--gold) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    font-weight: 400;
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.8s;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); opacity: 0.5; }
}

/* --- SECTIONS --- */
.section {
    position: relative;
    padding: 120px 40px;
    z-index: 1;
}

.section-alt {
    background: var(--bg-secondary);
}

.container {
    max-width: var(--container);
    margin: 0 auto;
}

.section-label {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--cyan);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 16px;
    color: var(--white);
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 560px;
    margin-bottom: 60px;
}

.section-cta {
    text-align: center;
    margin-top: 50px;
}

/* --- CONTENT CARDS --- */
.content-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.content-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.content-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.content-card:hover::before { opacity: 1; }

.card-icon {
    color: var(--cyan);
    margin-bottom: 16px;
    opacity: 0.7;
}

.card-stats {
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gold);
    margin-bottom: 12px;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
}

.card-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    flex: 1;
    margin-bottom: 16px;
}

.card-tag {
    display: inline-block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--cyan);
    background: var(--cyan-dim);
    padding: 4px 12px;
    border-radius: 20px;
    align-self: flex-start;
}

/* --- PROJECT CARDS --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 3px solid var(--cyan);
    border-radius: 8px;
    padding: 32px;
    transition: all var(--transition);
}

.project-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    border-left-color: var(--gold);
    transform: translateY(-3px);
}

.project-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--gold);
    background: var(--gold-dim);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 14px;
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 10px;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tags span {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    border: 1px solid var(--border);
    padding: 3px 10px;
    border-radius: 4px;
}

/* --- ABOUT --- */
.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 60px;
    align-items: start;
}

.photo-placeholder {
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.photo-star {
    font-size: 3rem;
    color: var(--cyan);
    opacity: 0.3;
}

.about-lead {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--white);
    line-height: 1.5;
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.about-credentials {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.credential {
    display: flex;
    flex-direction: column;
}

.credential-number {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--cyan);
    line-height: 1;
}

.credential-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 6px;
}

/* --- LINKS --- */
.links-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
}

.link-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 400;
    transition: all var(--transition);
}

.link-pill:hover {
    background: var(--bg-card-hover);
    border-color: var(--cyan);
    color: var(--cyan);
    transform: translateY(-2px);
}

.link-icon {
    display: flex;
    color: var(--cyan);
    opacity: 0.7;
}

.link-pill:hover .link-icon { opacity: 1; }

/* --- FOOTER --- */
.footer {
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 60px 40px 30px;
    overflow: hidden;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
}

.footer-brand {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--cyan);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-quote {
    font-family: var(--font-display);
    font-style: italic;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.footer-location {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* --- DOT GRID --- */
.dot-grid {
    width: 100%;
    height: 120px;
    position: relative;
    margin-top: 20px;
    overflow: hidden;
}

.dot {
    position: absolute;
    font-size: 8px;
    color: rgba(255, 255, 255, 0.15);
    transition: all 0.15s ease;
    will-change: transform, color;
    user-select: none;
}

/* --- REVEAL ANIMATION --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .content-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-photo { max-width: 240px; }
}

@media (max-width: 768px) {
    .nav { padding: 14px 20px; }
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
    .mobile-menu { display: flex; }

    .hero { padding: 100px 20px 60px; }
    .section { padding: 80px 20px; }

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

    .about-credentials {
        flex-direction: row;
        gap: 24px;
    }

    .footer { padding: 40px 20px 20px; }
    .footer-grid { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .hero-title { letter-spacing: -1px; }
    .hero-cta { flex-direction: column; width: 100%; }
    .btn-primary, .btn-ghost { width: 100%; justify-content: center; }
    .links-grid { flex-direction: column; }
    .link-pill { width: 100%; justify-content: center; }
    .about-credentials { flex-wrap: wrap; }
}

/* --- REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal { opacity: 1; transform: none; }
}

/* --- HIGH CONTRAST --- */
@media (prefers-contrast: high) {
    :root {
        --bg-card: rgba(0, 0, 0, 0.8);
        --border: rgba(255, 255, 255, 0.5);
    }
    .btn-primary, .nav-cta { border: 2px solid currentColor; }
}

/* --- PRINT --- */
@media print {
    body { background: white !important; color: black !important; }
    .nav, #starfield, .grain, .scroll-hint, .dot-grid { display: none !important; }
}

/* --- TOUCH DEVICES --- */
@media (hover: none) and (pointer: coarse) {
    .content-card:hover,
    .project-card:hover,
    .link-pill:hover { transform: none; }
    .btn-primary, .btn-ghost, .link-pill { min-height: 48px; }
}

/* --- SAFE AREA INSETS --- */
@supports (padding: env(safe-area-inset-bottom)) {
    .footer-bottom { padding-bottom: calc(30px + env(safe-area-inset-bottom)); }
    .nav {
        padding-left: max(40px, env(safe-area-inset-left));
        padding-right: max(40px, env(safe-area-inset-right));
    }
}

/* --- BACKDROP-FILTER FALLBACK --- */
@supports not (backdrop-filter: blur(1px)) {
    .nav { background: rgba(10, 10, 18, 0.95); }
}