/*
 * HOME.CSS – Estilos de la página principal IAFER
 * Paleta: midnight #181925 · coral #DC4437 · orange #E28C28
 */

/* ==============================
   VARIABLES
============================== */
:root {
    --home-coral:      #DC4437;
    --home-orange:     #E28C28;
    --home-midnight:   #181925;
    --home-card-bg:    #212232;
    --home-light-bg:   #2a2b3d;
    --home-text:       #ffffff;
    --home-muted:      #b8c5d1;
    --home-border:     rgba(255,255,255,0.08);
    --home-font:       'Poppins', sans-serif;
    --transition:      0.3s ease;
}

/* ==============================
   GLOBAL OVERRIDES FOR HOME
============================== */
body {
    font-family: var(--home-font);
    background: linear-gradient(135deg, var(--home-midnight) 0%, var(--home-light-bg) 100%);
    color: var(--home-text);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(220,68,55,0.10) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(226,140,40,0.10) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ==============================
   LOGOS BANNER
============================== */
.logos-banner {
    background: #ffffff;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 3px solid var(--home-coral);
}

.logos-banner__img {
    max-width: 1100px;
    width: 100%;
    height: auto;
    display: block;
}

/* ==============================
   HERO
============================== */
.hero {
    position: relative;
    padding: 6rem 0 5rem;
    overflow: hidden;
}

.hero__particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
    animation: float 8s ease-in-out infinite;
}

.p1 { width: 320px; height: 320px; background: radial-gradient(circle, var(--home-coral), transparent 70%); top: -80px; left: -80px; animation-delay: 0s; }
.p2 { width: 240px; height: 240px; background: radial-gradient(circle, var(--home-orange), transparent 70%); bottom: -60px; right: 5%; animation-delay: 2s; }
.p3 { width: 160px; height: 160px; background: radial-gradient(circle, var(--home-coral), transparent 70%); top: 30%; right: 15%; animation-delay: 4s; }
.p4 { width: 100px; height: 100px; background: radial-gradient(circle, var(--home-orange), transparent 70%); top: 60%; left: 10%; animation-delay: 1s; }
.p5 { width: 200px; height: 200px; background: radial-gradient(circle, var(--home-midnight), transparent 70%); top: 10%; left: 40%; animation-delay: 3s; }

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50%       { transform: translateY(-20px) scale(1.05); }
}

.hero__content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.hero__badge {
    display: inline-block;
    background: rgba(220,68,55,0.15);
    border: 1px solid rgba(220,68,55,0.4);
    color: #ff7b70;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.35rem 1.1rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.hero__title {
    font-size: clamp(3.5rem, 10vw, 6.5rem);
    font-weight: 800;
    line-height: 1.05;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero__title--accent {
    background: linear-gradient(135deg, var(--home-coral) 0%, var(--home-orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-weight: 500;
    color: var(--home-text);
    margin-bottom: 0.75rem;
}

.hero__desc {
    font-size: 1rem;
    color: var(--home-muted);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==============================
   BUTTONS
============================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    font-family: var(--home-font);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    border: none;
}

.btn--primary {
    background: linear-gradient(135deg, var(--home-coral), #b83228);
    color: #fff;
    box-shadow: 0 8px 24px rgba(220,68,55,0.35);
}
.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(220,68,55,0.5);
}

.btn--secondary {
    background: linear-gradient(135deg, var(--home-orange), #b86e1a);
    color: #fff;
    box-shadow: 0 8px 24px rgba(226,140,40,0.35);
}
.btn--secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(226,140,40,0.5);
}

.btn--outline {
    background: transparent;
    color: var(--home-text);
    border: 2px solid rgba(255,255,255,0.25);
}
.btn--outline:hover {
    border-color: rgba(255,255,255,0.6);
    transform: translateY(-2px);
}

/* ==============================
   SECTIONS
============================== */
.section {
    padding: 5rem 0;
}

.section--alt {
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(4px);
}

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

.section__title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.75rem;
    position: relative;
    display: inline-block;
}

.section__title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    margin: 0.6rem auto 0;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--home-coral), var(--home-orange));
}

.section__subtitle {
    color: var(--home-muted);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ==============================
   RESEARCH LINES
============================== */
.research-lines__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.research-card {
    background: var(--home-card-bg);
    border: 1px solid var(--home-border);
    border-radius: 1.25rem;
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    border-radius: 1.25rem 1.25rem 0 0;
}

.research-card--gpais::before {
    background: linear-gradient(90deg, var(--home-coral), var(--home-orange));
}

.research-card--trustworthy::before {
    background: linear-gradient(90deg, #f59e0b, #d97706);
}

.research-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.research-card__icon {
    font-size: 2.5rem;
}

.research-card__tag {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--home-muted);
}

.research-card__title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    margin: 0;
}

.research-card--gpais   .research-card__title { color: var(--home-coral); }
.research-card--trustworthy .research-card__title { color: #f59e0b; }

.research-card__name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--home-muted);
    margin: -0.25rem 0 0;
    font-style: italic;
}

.research-card__desc {
    font-size: 0.95rem;
    color: var(--home-muted);
    line-height: 1.7;
    flex: 1;
}

.research-card__tags {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.research-card__tags li {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    padding: 0.2rem 0.7rem;
    border-radius: 50px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    color: var(--home-muted);
}

.research-card__cta {
    align-self: flex-start;
    margin-top: 0.5rem;
}

/* ==============================
   TEAM / QUIÉNES SOMOS
============================== */
.team__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.member-card {
    background: var(--home-card-bg);
    border: 1px solid var(--home-border);
    border-radius: 1.25rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition);
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 36px rgba(0,0,0,0.4);
}

/* Photo area */
.member-card__photo-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    background: var(--home-light-bg);
    overflow: hidden;
}

.member-card__photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.member-card__photo-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    background: linear-gradient(135deg, var(--home-light-bg), var(--home-card-bg));
    /* shown by default; hidden when real photo loads */
}

/* Hide placeholder when photo present (via JS fallback onerror hides img and shows placeholder) */
.member-card__photo[src]:not([src=""]) ~ .member-card__photo-placeholder {
    display: none;
}

/* Info area */
.member-card__info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    flex: 1;
}

.member-card__name {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
    color: var(--home-text);
}

.member-card__role {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--home-coral);
    margin: 0;
}

.member-card__desc {
    font-size: 0.88rem;
    color: var(--home-muted);
    line-height: 1.6;
    flex: 1;
    margin: 0.4rem 0 0.6rem;
}

.member-card__links {
    display: flex;
    gap: 0.6rem;
    margin-top: auto;
}

.member-link {
    font-size: 1.2rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    transition: background var(--transition), transform var(--transition);
}

.member-link:hover {
    background: rgba(220,68,55,0.2);
    transform: scale(1.1);
}

/* ==============================
   FOOTER
============================== */
.footer {
    background: rgba(0,0,0,0.35);
    border-top: 1px solid var(--home-border);
    padding: 2rem 0;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer__copy {
    font-size: 0.85rem;
    color: var(--home-muted);
    margin: 0;
}

.footer__nav {
    display: flex;
    gap: 1.5rem;
}

.footer__nav a {
    font-size: 0.85rem;
    color: var(--home-muted);
    text-decoration: none;
    transition: color var(--transition);
}

.footer__nav a:hover {
    color: var(--home-coral);
}

/* ==============================
   RESPONSIVE - Mejorado
============================== */

/* Mobile pequeño (320px - 480px) */
@media (max-width: 480px) {
    body {
        font-size: 14px;
    }

    .container {
        padding: 0 1rem;
    }

    .hero {
        padding: 2rem 0 1.5rem;
    }

    .hero__title {
        font-size: clamp(2rem, 8vw, 2.5rem);
    }

    .hero__subtitle {
        font-size: clamp(0.875rem, 2vw, 1rem);
    }

    .hero__desc {
        font-size: 0.875rem;
        margin: 0.75rem auto 1.5rem;
        padding: 0 0.5rem;
    }

    .hero__actions {
        flex-direction: column;
        gap: 0.75rem;
    }

    .hero__particles {
        display: none;
    }

    .logos-banner {
        padding: 0.5rem 1rem;
    }

    .research-lines__grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .team__grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .research-card {
        padding: 1.25rem;
    }

    .research-card__tags {
        gap: 0.5rem;
    }

    .research-card__tags li {
        font-size: 0.7rem;
        padding: 0.25rem 0.5rem;
    }

    .footer {
        padding: 2rem 0;
    }

    .footer__inner {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .footer__nav {
        justify-content: center;
        flex-direction: column;
    }

    .footer__nav a {
        padding: 0.5rem 0;
    }

    .btn {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
        min-height: 44px;
    }
}

/* Tablet pequeña (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    .hero {
        padding: 3rem 0 2.5rem;
    }

    .hero__title {
        font-size: clamp(2.5rem, 8vw, 4rem);
    }

    .hero__desc {
        margin: 1rem auto 2rem;
    }

    .hero__actions {
        flex-direction: column;
    }

    .research-lines__grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .team__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .research-card {
        padding: 1.5rem;
    }

    .section {
        padding: 3rem 0;
    }

    .footer__inner {
        flex-direction: column;
        text-align: center;
    }

    .footer__nav {
        justify-content: center;
    }
}

/* Tablet mediana/grande (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .research-lines__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .team__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .carousel-wrapper {
        padding: 0 2rem;
    }
}

/* Desktop pequeño (1025px - 1280px) */
@media (min-width: 1025px) and (max-width: 1280px) {
    .team__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .research-lines__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop grande (1281px+) */
@media (min-width: 1281px) {
    .team__grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .research-lines__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==============================
   PUBLICATIONS SECTION
============================== */
.publications-section {
    background: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(220,68,55,0.08) 100%);
}

.publications-section .carousel-wrapper {
    margin: 0;
}

.publications-section .paper-card {
    background: linear-gradient(135deg, var(--home-card-bg) 0%, var(--home-light-bg) 100%);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.publications-section .paper-card:hover {
    box-shadow: 0 16px 40px rgba(220,68,55,0.3);
}

.publications-section .paper-badge {
    background: linear-gradient(135deg, var(--home-coral), var(--home-orange));
}

.publications-section .btn-small.btn-primary {
    background: linear-gradient(135deg, var(--home-coral), #b83228);
}

.publications-section .btn-small.btn-secondary {
    background: var(--home-card-bg);
    border-color: var(--home-coral);
    color: var(--home-coral);
}

.publications-section .btn-small.btn-secondary:hover {
    background: var(--home-coral);
    color: white;
}