/* Reset y estilos base mejorados */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

:root {
    --primary: #1e40af;
    --primary-dark: #1e3a8a;
    --secondary: #3b82f6;
    --accent: #d4af37;
    --light: #f8fafc;
    --dark: #1e293b;
    --gray: #64748b;
    --light-gray: #e2e8f0;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    background: url('https://static.vecteezy.com/system/resources/thumbnails/001/370/782/small/black-with-gold-accent-background-free-vector.jpg') no-repeat center center fixed;
    background-size: cover;
    color: var(--white);
    line-height: 1.7;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header profesional */
header {
    text-align: center;
    padding: 100px 0 80px;
    position: relative;
    margin-bottom: 40px;
}

header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--accent);
}

.header-title {
    font-size: 3rem;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.header-subtitle {
    font-size: 1.25rem;
    color: var(--accent);
    font-weight: 500;
    max-width: 700px;
    margin: 0 auto;
}

/* Secciones profesionales */
.section {
    background: rgba(30, 41, 59, 0.9);
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 50px;
    padding: 50px;
    border-left: 4px solid var(--accent);
    transition: var(--transition);
    backdrop-filter: blur(5px);
}

.section:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.section-title {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--accent);
    text-align: center;
    position: relative;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background: var(--accent);
    margin: 15px auto 0;
}

/* Skills mejorados */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 30px;
    margin-top: 40px;

    /* NUEVO: alturas consistentes y alineación */
    grid-auto-rows: 190px;              /* altura estándar de tarjeta */
    align-items: stretch;
}

.skill-card {
    text-align: center;
    transition: var(--transition);
    perspective: 1000px;

    /* NUEVO: ocupar toda la celda */
    height: 100%;
    display: flex;
}

.skill-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    border-radius: 10px;
}

.skill-card:hover .skill-card-inner {
    transform: rotateY(180deg);
}

.skill-card-front, .skill-card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    padding: 22px 14px;
    border-radius: 10px;

    /* NUEVO: centro perfecto */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.skill-card-front {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.skill-card-back {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    transform: rotateY(180deg);
    color: white;
}

.skill-icon {
    width: 70px;
    height: 70px;
    object-fit: contain;
    margin-bottom: 12px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    transition: var(--transition);
}

.skill-card:hover .skill-icon {
    filter: drop-shadow(0 6px 12px rgba(212, 175, 55, 0.4));
}

.skill-name {
    font-weight: 600;
    color: var(--white);
    font-size: 1rem;
}

.skill-card-back .skill-name {
    color: var(--accent);
    font-weight: 700;
}

/* Proyectos profesionales */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.project-card {
    background: rgba(30, 41, 59, 0.8);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    position: relative;
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--accent);
}

.project-content {
    padding: 30px;
}

.project-title {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--accent);
    font-weight: 600;
}

.project-description {
    color: var(--light-gray);
    margin-bottom: 20px;
    font-size: 1rem;
    line-height: 1.7;
}

.project-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--dark);
    padding: 12px 25px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 1rem;
    transition: var(--transition);
    font-weight: 600;
    margin-top: 15px;
}

.project-link:hover {
    background: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
}

.project-link i {
    margin-right: 10px;
}

/* Responsive mejorado */
@media (max-width: 992px) {
    .header-title { font-size: 2.5rem; }
    .section { padding: 40px; }
}

@media (max-width: 768px) {
    header { padding: 80px 0 60px; }
    .header-title { font-size: 2rem; }
    .skills-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 20px; grid-auto-rows: 180px; }
    .projects-grid { grid-template-columns: 1fr; gap: 30px; }
    .section { padding: 30px; }
}

@media (max-width: 576px) {
    header { padding: 60px 0 40px; }
    .header-title { font-size: 1.8rem; }
    .header-subtitle { font-size: 1rem; }
    .skills-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 15px; grid-auto-rows: 170px; }
    .section { padding: 25px; }
}