/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #00d9ff;
    --color-secondary: #a78bfa;
    --color-accent: #ec4899;
    --color-bg-dark: #0f172a;
    --color-bg-medium: #1e293b;
    --color-bg-light: #334155;
    --color-text-primary: #ffffff;
    --color-text-secondary: #cbd5e1;
    --transition-speed: 0.3s;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text-primary);
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #312e81 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Barra de navegación */
.navbar {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: all var(--transition-speed) ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: transform var(--transition-speed) ease;
}

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

.nav-link:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    text-align: center;
    padding: 3rem 1rem;
    margin-bottom: 3rem;
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    border-radius: 2px;
}

.main-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    font-weight: 300;
}

/* Content */
.content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
    padding: 1rem 0;
}

/* Project Cards */
.project-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-speed) ease;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:first-child::before {
    background: linear-gradient(90deg, var(--color-primary), #06b6d4);
}

.project-card:last-child::before {
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
}

/* Card Header */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
}

.card-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-primary);
    flex: 1;
    min-width: 200px;
}

.card-badge {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.2), rgba(167, 139, 250, 0.2));
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.375rem 0.875rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
}

/* Card Body */
.card-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
}

.card-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

.card-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.card-features li {
    color: var(--color-text-secondary);
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.card-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Card Footer */
.card-footer {
    margin-top: auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    width: 100%;
    justify-content: center;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
    transform: translateX(-100%);
    transition: transform var(--transition-speed) ease;
}

.btn:hover::before {
    transform: translateX(0);
}

.btn-primary {
    background: linear-gradient(135deg, #00d9ff, #06b6d4);
    color: var(--color-bg-dark);
}

.btn-primary:hover {
    box-shadow: 0 8px 20px rgba(0, 217, 255, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: linear-gradient(135deg, #a78bfa, #ec4899);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    box-shadow: 0 8px 20px rgba(167, 139, 250, 0.4);
    transform: translateY(-2px);
}

.btn-icon {
    transition: transform var(--transition-speed) ease;
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 3rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.9rem;
        padding: 0.4rem 0.8rem;
    }

    .container {
        padding: 1rem;
    }

    .header {
        padding: 2rem 1rem;
        margin-bottom: 2rem;
    }

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

    .project-card {
        padding: 1.5rem;
    }

    .card-title {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        gap: 0.5rem;
    }

    .nav-link {
        font-size: 0.85rem;
        padding: 0.35rem 0.6rem;
    }

    .header {
        padding: 1.5rem 0.5rem;
    }

    .project-card {
        padding: 1.25rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .card-badge {
        align-self: flex-start;
    }
}

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

.header,
.project-card {
    animation: fadeInUp 0.6s ease-out;
}

.project-card:nth-child(2) {
    animation-delay: 0.1s;
}

/* Accesibilidad */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible para accesibilidad */
.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}