/* ==========================================================================
   PORTAFOLIO PROFESIONAL - GUSTAVO GUTIÉRREZ GONZÁLEZ
   Estilos Globales y Sistema de Diseño (CSS Variable-Based)
   Enfoque: Desarrollador Full-Stack (Mid-Level) / Matemático
   ========================================================================== */

/* Importación de tipografías premium desde Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Paleta de Colores (Inspirada en Lógica Matemática y Confiabilidad Backend) */
    --bg-primary: #0b0f19;
    /* Fondo profundo oscuro slate-blue */
    --bg-secondary: #131b2e;
    /* Fondo de tarjetas, secciones y contenedores */
    --bg-tertiary: #1e2942;
    /* Elementos interactivos y estados hover */

    /* Colores de Acento (Teal/Cian para precisión y Violeta para IA/Innovación) */
    --accent-cyan: #06b6d4;
    /* Cian matemático/lógico (APIs, Frontend) */
    --accent-cyan-rgb: 6, 182, 212;
    --accent-purple: #8b5cf6;
    /* Violeta para bases de datos, IA y Cloud */
    --accent-purple-rgb: 139, 92, 246;
    --accent-emerald: #10b981;
    /* Éxito: Pagos (Stripe, Mercado Pago) y SEP */
    --accent-amber: #f59e0b;
    /* Alerta/NDA: Proyectos confidenciales corporativos */

    /* Colores de Texto */
    --text-primary: #ffffff;
    /* Blanco Puro para mayor contraste */
    --text-secondary: #e2e8f0;
    /* Gris Slate muy claro para excelente contraste en descripciones y metadatos */
    --text-muted: #cbd5e1;
    /* Gris Slate claro para comentarios e info secundaria */

    /* Bordes y Sombras */
    --border-color: #223049;
    /* Bordes sutiles en tarjetas */
    --border-hover: #334b72;
    /* Borde iluminado para interactividad */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);

    /* Gradientes */
    --grad-primary: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    --grad-dark: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    --grad-card: linear-gradient(145deg, rgba(19, 27, 46, 0.9) 0%, rgba(30, 41, 66, 0.7) 100%);

    /* Tipografías */
    --font-main: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Transiciones */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Resets y Estilos Generales
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 17.5px;
    /* Aumentado ligeramente para mayor legibilidad */
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    /* Mayor espacio entre líneas para lectura más cómoda */
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Barra de desplazamiento personalizada */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* ==========================================================================
   Sobrescritura y Compatibilidad con Bootstrap 5
   ========================================================================== */
.navbar {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(11, 15, 25, 0.85) !important;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.navbar-brand {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-primary) !important;
    letter-spacing: -0.5px;
}

.navbar-brand span {
    color: var(--accent-cyan);
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 10%;
    width: 0;
    height: 2px;
    background: var(--grad-primary);
    transition: var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* Tarjetas (Cards) de Bootstrap */
.card {
    background: var(--grad-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-primary);
    transition: var(--transition-normal);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-weight: 700;
    color: var(--text-primary);
}

.card-body {
    padding: 1.75rem;
}

/* Botones con estilo premium */
.btn {
    border-radius: 8px;
    font-weight: 600;
    padding: 0.6rem 1.5rem;
    transition: var(--transition-fast);
}

.btn-primary {
    background: var(--grad-primary);
    border: none;
    color: var(--bg-primary) !important;
    box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
    filter: brightness(1.1);
}

.btn-outline-primary {
    border: 1.5px solid var(--accent-cyan);
    color: var(--accent-cyan);
    background: transparent;
}

.btn-outline-primary:hover {
    background: rgba(6, 182, 212, 0.1);
    color: var(--text-primary);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* Modificación de Inputs */
.form-control,
.form-select {
    background-color: var(--bg-secondary) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent-cyan) !important;
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2) !important;
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* ==========================================================================
   Componentes de Diseño Propios y Utilidades
   ========================================================================== */

/* Efecto de texto degradado */
.text-gradient {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* Tipografía de código / matemáticas para reclutadores */
.code-stat {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-cyan);
}

/* Badges de tecnología personalizados */
.tech-badge {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35rem 0.75rem;
    margin: 0.25rem;
    background-color: rgba(30, 41, 66, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 20px;
    transition: var(--transition-fast);
}

.tech-badge:hover {
    color: var(--text-primary);
    border-color: var(--accent-cyan);
    background-color: rgba(6, 182, 212, 0.08);
}

/* Insignia NDA (Confidencialidad Obligatoria) */
.nda-badge {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-main);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--accent-amber);
}

/* Estilo para las secciones principales */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--grad-primary);
    border-radius: 2px;
}

/* Hero Section */
.hero-section {
    min-height: 65vh;
    display: flex;
    align-items: center;
    position: relative;
    background-image: radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 45%);
}

.hero-subtitle {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
}

/* ==========================================================================
   Cronograma de Experiencia Profesional (Timeline)
   ========================================================================== */
.experience-timeline {
    position: relative;
    border-left: 2px solid var(--border-color);
    padding-left: 2.5rem;
    margin-left: 1rem;
}

.timeline-item {
    position: relative;
    margin-bottom: 3.5rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: calc(-2.5rem - 6px);
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-cyan);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.8);
    transition: var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    background: var(--accent-purple);
    box-shadow: 0 0 12px rgba(139, 92, 246, 0.8);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.timeline-company {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.timeline-body {
    color: var(--text-secondary);
    font-size: 0.975rem;
}

.timeline-body ul {
    padding-left: 1.2rem;
    margin-top: 0.5rem;
}

/* ==========================================================================
   Grid de Skills (Diseño Compacto y Profesional)
   ========================================================================== */
.skills-card {
    background: rgba(19, 27, 46, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    height: 100%;
    transition: var(--transition-normal);
}

.skills-card:hover {
    border-color: rgba(6, 182, 212, 0.4);
    background: rgba(19, 27, 46, 0.8);
    transform: translateY(-3px);
}

.skills-category {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skills-category i {
    color: var(--accent-cyan);
}

/* ==========================================================================
   Sección NDA / Privacidad de Proyectos
   ========================================================================== */
.nda-alert-box {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.05) 0%, rgba(19, 27, 46, 0.9) 100%);
    border-left: 4px solid var(--accent-amber);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 2.5rem;
}

.nda-alert-title {
    color: var(--accent-amber);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nda-alert-desc {
    font-size: 0.925rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Tarjetas específicas de Proyectos Corporativos (Privados) */
.project-card-confidential {
    position: relative;
}

.project-card-confidential::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 45px 45px 0;
    border-color: transparent var(--accent-amber) transparent transparent;
    z-index: 2;
    opacity: 0.8;
}

.project-card-confidential::after {
    content: 'NDA';
    position: absolute;
    top: 6px;
    right: 4px;
    color: var(--bg-primary);
    font-family: var(--font-main);
    font-size: 0.65rem;
    font-weight: 800;
    transform: rotate(45deg);
    z-index: 3;
}

/* ==========================================================================
   Tarjetas de Proyectos Demostrables (Públicos)
   ========================================================================== */
.project-card-demo {
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.project-card-demo:hover {
    border-color: var(--accent-cyan);
}

.project-links {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
}

.project-link-item {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    transition: var(--transition-fast);
}

.project-link-item:hover {
    color: var(--accent-cyan);
}

/* ==========================================================================
   Pie de Página (Footer)
   ========================================================================== */
footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    background-color: var(--bg-primary);
}

.footer-logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 1.25rem;
}

.social-link-item {
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.social-link-item:hover {
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* ==========================================================================
   Responsive adjustments
   ========================================================================== */
@media (max-width: 991.98px) {
    .hero-title {
        font-size: 2.75rem;
    }

    section {
        padding: 4rem 0;
    }
}

@media (max-width: 767.98px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .experience-timeline {
        padding-left: 1.5rem;
        margin-left: 0.5rem;
    }

    .timeline-dot {
        left: calc(-1.5rem - 6px);
    }
}

.border-cyan-glow {
    border-color: var(--accent-cyan) !important;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.25) !important;
}

/* Botones de Tiendas de Aplicaciones */
.store-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 6px;
    text-decoration: none;
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
    background-color: rgba(30, 41, 66, 0.4);
}

.store-link-android {
    color: #3ddc84 !important;
    /* Android green */
}

.store-link-android:hover {
    background-color: rgba(61, 220, 132, 0.1);
    border-color: #3ddc84;
    color: #3ddc84 !important;
}

.store-link-ios {
    color: #00c6ff !important;
    /* iOS blue/cyan */
}

.store-link-ios:hover {
    background-color: rgba(0, 198, 255, 0.1);
    border-color: #00c6ff;
    color: #00c6ff !important;
}

.border-hover-highlight {
    transition: var(--transition-fast);
}

.border-hover-highlight:hover {
    border-color: var(--accent-cyan) !important;
    color: var(--text-primary) !important;
    background-color: rgba(6, 182, 212, 0.08) !important;
}

/* Sobreescribir la clase de bootrap */
.text-secondary {
    color: white !important;
}