:root {
    --orange: #ff8422;
    --blue: #0c2474;
    --orange-gradient: linear-gradient(135deg, #fff7ed 0%, #fed7aa 100%);
    --blue-gradient: linear-gradient(135deg, #1a2a5f 0%, #1E40AF 50%, #5c73f6 100%);
    --nav-offset: 120px;
}

@media (max-width: 768px) {
    :root {
        --nav-offset: 100px;
    }
}

@media (max-width: 480px) {
    :root {
        --nav-offset: 90px;
    }
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-out;
}

.slide-in {
    animation: slideIn 0.6s ease-out;
}

/* Navigation */
nav {
    background: white;
    backdrop-filter: blur(10px);
    border-bottom: 3px solid var(--orange);
    transition: all 0.3s ease;
}

.nav-btn {
    color: var(--blue);
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.nav-btn:hover {
    color: #ffffff;
    background-color: var(--orange);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 165, 0, 0.4);
}

.nav-btn.active {
    color: var(--blue);
    background-color: var(--orange);
}

.container-img {
    width: 40%;
    min-width: 180px;
    /* Ancho mínimo para que quepa el contenido */
}

.capstone-text {
    color: var(--blue);
    font-weight: 800;
    font-size: clamp(1rem, 2.8vw, 1.8rem) !important;
    white-space: nowrap;
}

/* Forzar menú desktop */
#nav-desktop {
    display: none;
}

@media (min-width: 768px) {
    #nav-desktop {
        display: flex !important;
        align-items: center;
        gap: 0.5rem;
        margin-left: auto;
    }

    #nav-desktop.hidden {
        display: flex !important;
    }
}

/* Responsivo */
@media (max-width: 640px) {
    .container-img {
        width: 55%;
        min-width: 160px;
    }
}

@media (min-width: 1024px) {
    .container-img {
        width: 33%;
        min-width: 200px;
    }
}

@media (min-width: 1280px) {
    .container-img {
        width: 31%;
    }
}

/* Hook Section */
.gradient-bg {
    background: linear-gradient(135deg, #1a2a5f 0%, #1E40AF 50%, #5c73f6 100%);
    position: relative;
    overflow: hidden;
    padding-top: 120px;
}

.gradient-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="80" r="1.5" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: float 20s infinite linear;
}

@keyframes float {
    0% {
        transform: translateY(0px) rotate(0deg);
    }

    100% {
        transform: translateY(-100px) rotate(360deg);
    }
}

.hook-title {
    /*text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);*/
    background: linear-gradient(45deg, #ffffff, #f0f9ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(45deg, #bd5908, #e99754);
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(30, 64, 175, 0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--orange);
    border: 2px solid var(--orange);
    padding: 12px 32px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: var(--orange);
    color: #ffffff;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 165, 0, 0.4);
}

@media (max-width: 768px) {
    .gradient-bg {
        padding-top: 100px;
    }
}

@media (max-width: 480px) {
    .gradient-bg {
        padding-top: 90px;
    }
}

/*Each section*/
.section {
    scroll-margin-top: var(--nav-offset);
    transition: all 0.5s ease-in-out;
}


/* ===== Problem Section ===== */
.problem-bg {
    background: linear-gradient(135deg, #c58908 0%, #f3bf84 50%, #ff8422 100%);
    position: relative;
    padding-top: var(--nav-offset);
}

.containter-title p {
    color: rgba(131, 64, 9, 0.63);
    font-weight: 600;
}

/*Spinner in problem card time waste*/
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/*Animated filter*/
.filter-slider {
    width: 40px;
    height: 40px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
}

.slider-track {
    width: 100%;
    height: 3px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    position: relative;
}

.slider-track::before,
.slider-track::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 50%;
    top: -4px;
    animation: slideFilter 2s ease-in-out infinite;
}

.slider-track::before {
    left: 5px;
}

.slider-track::after {
    right: 5px;
    animation-delay: 1s;
    animation-direction: reverse;
}

@keyframes slideFilter {

    0%,
    100% {
        transform: translateX(0);
    }

    50% {
        transform: translateX(15px);
    }
}

.container-problem-card p {
    color: white;
}

.problem-card {
    background: rgba(119, 83, 15, 0.637);
    border: 1px solid rgba(255, 170, 13, 0.911);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.problem-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(221, 176, 92, 0.493);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-btn {
        padding: 6px 12px;
        font-size: 14px;
    }

    .hook-title {
        font-size: 2.5rem !important;
    }

    .btn-primary,
    .btn-secondary {
        padding: 10px 24px;
        font-size: 16px;
    }

    .team-card,
    .problem-card,
    .impact-card {
        margin-bottom: 1rem;
    }
}

/* ===== Solution Section ===== */

.solution-bg {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #e0e7ff 100%);
    padding-top: var(--nav-offset);
}

#solution {
    scroll-margin-top: var(--nav-offset);
}

/*BLOCK 1*/
.solution-h2 {
    color: var(--blue);
}

/*BLOCK 2*/

.key-features-h3 {
    color: var(--blue);
}

.block-one-solution {
    padding-bottom: 12vh;
}

/* Cards de Key Features con borde de color y animación */
.key-feature-card {
    background: #fff;
    /*border: 1px solid rgba(8, 19, 165, 0.2);*/
    border: 1px solid rgba(8, 19, 165, 0.637);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    transition: transform .3s ease, box-shadow .3s ease, opacity .3s ease;
    position: relative;
    overflow: hidden;
}

.key-feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--blue-gradient);
    /* igual al de .team-card */
    opacity: 0;
    transition: opacity .3s ease;
    pointer-events: none;
    /* no bloquea clics */
    z-index: 0;
    /* debajo del contenido */
}

.key-feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 47, 255, 0.3);
    /* mismo “glow” cálido */
}

.key-feature-card:hover::before {
    opacity: 1;
    /* aparece el overlay */
}

/* Asegura que el contenido quede encima del overlay */
.key-feature-card>* {
    position: relative;
    z-index: 1;
}

.key-feature-card:hover * {
    color: white !important;
}

/*BLOCK 3*/

.impact-h3 {
    color: var(--blue);
}

/* Cards de Impact */
.impact-card-gradient {
    background: white;
    border-left: 4px solid var(--blue);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 15px 35px rgba(1, 7, 43, 0.1);
    transition: all 0.3s ease;
}

.impact-card-gradient:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 47, 255, 0.3);
}

/* Animación de entrada suave */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .block-one-solution {
        padding-bottom: 5vh;
        padding-top: 3vh;
    }
}

/* Team Section */
.team-bg {
    background: linear-gradient(135deg, #0c2474 0%, #0f1a3d 50%, rgb(17, 35, 59) 100%);
    position: relative;
    padding-top: var(--nav-offset);
}

.team-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><polygon points="50,10 60,35 85,35 65,55 75,80 50,65 25,80 35,55 15,35 40,35" fill="rgba(255,165,0,0.05)"/></svg>') repeat;
    opacity: 0.1;
}

.team-card {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border: 1px solid rgba(255, 165, 0, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.team-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 165, 0, 0.1), rgba(30, 64, 175, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.team-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(255, 165, 0, 0.3);
}

.team-avatar {
    background: linear-gradient(45deg, #FFA500, #1E40AF);
    transition: all 0.3s ease;
}

.team-card:hover .team-avatar {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 10px 20px rgba(255, 165, 0, 0.4);
}

.team-card:hover .team-avatar-juan {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 10px 20px rgba(255, 165, 0, 0.4);
}

.team-avatar {
    background-size: 120%;
    background-position: center 23%;
    background-repeat: no-repeat;
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.team-avatar-juan {
    background: linear-gradient(45deg, #FFA500, #1E40AF);
    transition: all 0.3s ease;
    background-size: 120%;
    background-position: 60% 23%;
    background-repeat: no-repeat;
    border: 3px solid rgba(255, 255, 255, 0.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-btn {
        padding: 6px 12px;
        font-size: 14px;
    }

    .hook-title {
        font-size: 2.5rem !important;
    }

    .btn-primary,
    .btn-secondary {
        padding: 10px 24px;
        font-size: 16px;
    }

    .team-card,
    .problem-card,
    .impact-card {
        margin-bottom: 1rem;
    }
}

/* Loading Animation 
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 165, 0, 0.3), transparent);
    animation: loading 2s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }

    100% {
        left: 100%;
    }
}*/

.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Focus States for Accessibility */
.nav-btn:focus,
.btn-primary:focus,
.btn-secondary:focus {
    outline: 3px solid rgba(255, 165, 0, 0.6);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .gradient-bg {
        background: #1E40AF;
    }

    .nav-btn:hover {
        background-color: #000000;
        color: #ffffff;
    }
}