/* ===========================================
   ORGANIZADOR PEDD — Dark Theme
   Inspirado en Bulma CSS Dark Mode
   =========================================== */

/* ——— Google Fonts ——— */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ——— Variables ——— */
:root {
    /* Colores base (oscuro tipo Bulma dark) */
    --bg-base:        #0d1117;
    --bg-elevated:    #161b22;
    --bg-surface:     #1c2333;
    --bg-hover:       #21262d;

    /* Acento principal */
    --accent:         #3b82f6;
    --accent-hover:   #2563eb;
    --accent-glow:    rgba(59, 130, 246, 0.35);
    --accent-subtle:  rgba(59, 130, 246, 0.12);

    /* Acentos secundarios */
    --success:        #22c55e;
    --success-subtle: rgba(34, 197, 94, 0.12);
    --danger:         #ef4444;
    --danger-subtle:  rgba(239, 68, 68, 0.12);
    --warning:        #f59e0b;
    --info:           #06b6d4;

    /* Texto */
    --text-primary:   #e6edf3;
    --text-secondary: #8b949e;
    --text-muted:     #484f58;

    /* Bordes */
    --border:         rgba(48, 54, 61, 0.9);
    --border-glow:    rgba(59, 130, 246, 0.4);

    /* Efectos */
    --radius-sm:      0.5rem;
    --radius:         0.875rem;
    --radius-lg:      1.25rem;
    --shadow-sm:      0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
    --shadow:         0 4px 16px rgba(0,0,0,0.5);
    --shadow-accent:  0 8px 30px rgba(59, 130, 246, 0.2);
    --transition:     all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ——— Reset & Base ——— */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--text-primary);
    background-color: var(--bg-base);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ——— Overrides Bootstrap oscuro ——— */
.bg-light    { background-color: var(--bg-elevated) !important; }
.text-muted  { color: var(--text-secondary) !important; }
.text-primary { color: var(--accent) !important; }
.border-secondary { border-color: var(--border) !important; }
.alert-info  { background-color: rgba(6,182,212,0.12); border-color: rgba(6,182,212,0.3); color: var(--info); }
.alert-warning { background-color: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.3); color: var(--warning); }

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
}

a { color: var(--accent); transition: var(--transition); }
a:hover { color: var(--accent-hover); }

section { scroll-margin-top: 72px; }

/* ——— Navbar ——— */
.glass-nav {
    background: rgba(13, 17, 23, 0.85) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 0 rgba(48,54,61,0.6);
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}

.navbar-brand {
    font-size: 1.25rem !important;
    font-weight: 800 !important;
    letter-spacing: -0.02em;
    color: var(--accent) !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand i {
    font-size: 1.15rem;
}

.navbar-toggler {
    border-color: var(--border);
    color: var(--text-secondary);
}

.navbar-toggler:focus { box-shadow: 0 0 0 3px var(--accent-subtle); }
.navbar-toggler-icon {
    filter: invert(1) brightness(0.7);
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--text-secondary) !important;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0.875rem !important;
    border-radius: var(--radius-sm);
}

.navbar-nav .nav-link:hover {
    color: var(--text-primary) !important;
    background-color: var(--bg-hover);
}

.navbar-nav .nav-link.active {
    color: var(--accent) !important;
    background-color: var(--accent-subtle);
}

/* ——— Hero Section ——— */
.hero-section {
    position: relative;
    min-height: 82vh;
    display: flex;
    align-items: center;
    background: var(--bg-base);
    overflow: hidden;
}

/* Fondo animado con gradientes */
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 70% 40%, rgba(59,130,246,0.13) 0%, transparent 60%),
        radial-gradient(ellipse 50% 50% at 10% 80%, rgba(34,197,94,0.06) 0%, transparent 50%);
    z-index: 0;
    pointer-events: none;
}

/* Grid de puntos decorativo */
.hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(139,148,158,0.08) 1px, transparent 1px);
    background-size: 32px 32px;
    z-index: 0;
    pointer-events: none;
}

.hero-section .container { position: relative; z-index: 1; }

.hero-section .display-4 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    background: linear-gradient(135deg, #e6edf3 0%, #8b949e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-section .lead {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.75;
}

.hero-image img {
    max-width: 280px;
    width: 100%;
    filter: drop-shadow(0 0 40px rgba(59,130,246,0.3));
}

.min-vh-75 { min-height: 75vh; }

/* ——— Botones ——— */
.btn {
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius);
    transition: var(--transition);
    text-decoration: none;
    letter-spacing: 0.01em;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
    text-decoration: none;
}

.btn-lg {
    padding: 0.75rem 1.75rem;
    font-size: 1rem;
    border-radius: var(--radius);
}

/* Botón primario */
.btn-primary, .btn-outline-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: #fff !important;
    border: none;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover, .btn-outline-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, #1d4ed8 100%);
    box-shadow: 0 6px 25px var(--accent-glow);
    color: #fff !important;
}

/* Botón secundario / ghost */
.btn-outline-success {
    background: transparent;
    color: var(--success) !important;
    border: 1.5px solid var(--success);
}

.btn-outline-success:hover {
    background: var(--success-subtle);
    box-shadow: 0 4px 15px rgba(34,197,94,0.2);
    color: var(--success) !important;
    border-color: var(--success);
}

/* ——— Cards ——— */
.card {
    background: var(--bg-elevated);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow);
    transition: var(--transition);
    color: var(--text-primary);
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(59,130,246,0.25) !important;
    box-shadow: var(--shadow), 0 0 0 1px rgba(59,130,246,0.1);
}

.card-header {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%) !important;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0 !important;
    border-bottom: none !important;
    padding: 1.5rem 2rem;
    color: #fff !important;
}

.card-header h3, .card-header h5 {
    color: #fff;
}

.card-body {
    color: var(--text-primary);
}

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

.card-text {
    color: var(--text-secondary);
}

/* Shadow grande para tarjeta de descarga */
.shadow-lg {
    box-shadow: var(--shadow), var(--shadow-accent) !important;
}

/* ——— Features Section ——— */
.features-section {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.feature-icon { transition: var(--transition); }
.feature-icon:hover { transform: scale(1.15); }

.feature-icon .fa-check-circle { color: var(--success) !important; }
.feature-icon .fa-file-alt     { color: var(--accent) !important; }
.feature-icon .fa-arrow-down-up-lock { color: var(--info) !important; }

/* ——— How-to Section ——— */
.how-to-section {
    background: var(--bg-base);
}

.step-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    transition: var(--transition);
    height: 100%;
}

.step-card:hover {
    border-color: rgba(59,130,246,0.3);
    box-shadow: var(--shadow-accent);
    transform: translateY(-3px);
}

.step-card h5 { color: var(--text-primary); }
.step-card p  { color: var(--text-secondary); }

.step-number {
    width: 60px;
    height: 60px;
    font-size: 1.35rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%) !important;
    color: #fff !important;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px var(--accent-glow);
    margin-bottom: 1rem;
}

/* ——— Evaluation Section ——— */
.evaluation-section {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

/* ——— Download Buttons ——— */
.download-btn {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    border: none;
    border-radius: var(--radius);
    color: #fff !important;
    font-weight: 600;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.download-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--accent-glow);
    color: #fff !important;
}

.download-btn:hover::before { opacity: 1; }

/* ——— About Page ——— */
.about-hero {
    background: var(--bg-base);
    position: relative;
    overflow: hidden;
}

.about-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 60% at 80% 50%, rgba(59,130,246,0.1) 0%, transparent 60%);
    pointer-events: none;
}

.about-hero .container { position: relative; z-index: 1; }

.about-illustration {
    animation: float 3.5s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50%       { transform: translateY(-18px); }
}

/* Problema / Solución */
.problem-solution {
    background: var(--bg-elevated);
}

.problem-card, .solution-card {
    padding: 2rem;
    border-radius: var(--radius-lg);
    height: 100%;
    border: 1px solid;
}

.problem-card {
    background: var(--danger-subtle);
    border-color: rgba(239,68,68,0.25);
}

.solution-card {
    background: var(--success-subtle);
    border-color: rgba(34,197,94,0.25);
}

.problem-card h3  { color: var(--danger); }
.solution-card h3 { color: var(--success); }
.problem-card span, .solution-card span { color: var(--text-secondary); }

/* Tech cards */
.technical-features { background: var(--bg-base); }

.tech-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    color: var(--text-primary);
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: rgba(59,130,246,0.3);
    box-shadow: var(--shadow), var(--shadow-accent);
}

.tech-icon { transition: var(--transition); }
.tech-icon:hover { transform: scale(1.1); }

.tech-card p { color: var(--text-secondary); }

/* pedd-info */
.pedd-info { background: var(--bg-base); }
.feature-box h5 { color: var(--text-primary); }
.feature-box ul li { color: var(--text-secondary); }

/* ——— Contact Section ——— */
.contact-section {
    background: var(--bg-base);
    min-height: 80vh;
    display: flex;
    align-items: center;
    padding: 4rem 0;
}

.contact-icon {
    width: 52px;
    height: 52px;
    font-size: 1.25rem;
    transition: var(--transition);
}

.contact-icon:hover { transform: scale(1.1); }

.contact-item {
    transition: var(--transition);
    padding: 1rem;
    border-radius: var(--radius);
}

.contact-item:hover {
    background-color: var(--bg-hover);
}

/* ——— Formularios ——— */
.form-control, .form-select {
    background-color: var(--bg-surface);
    border: 1.5px solid var(--border);
    color: var(--text-primary);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
}

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

.form-label {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

/* ——— Timeline ——— */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 2rem;
}

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 0.25rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg-base);
    box-shadow: 0 0 0 3px var(--accent-subtle);
}

.timeline-content {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

/* ——— Footer ——— */
.footer {
    background: var(--bg-elevated) !important;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer h5 { color: var(--text-primary); }

.footer p.text-secondary,
.footer .text-secondary {
    color: var(--text-secondary) !important;
    font-size: 0.9rem;
}

.footer hr { border-color: var(--border) !important; opacity: 0.5; }

.footer a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer a:hover {
    color: var(--accent) !important;
    text-decoration: underline !important;
}

/* ——— Markdown container ——— */
.markdown-container {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.markdown-container h1,
.markdown-container h2,
.markdown-container h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.markdown-container h1 { font-size: 1.6rem; color: var(--accent); }
.markdown-container h2 { font-size: 1.3rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.markdown-container h3 { font-size: 1.1rem; }
.markdown-container p  { margin-bottom: 1.25rem; }

.markdown-container ul {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.markdown-container li { margin-bottom: 0.4rem; }

.markdown-container a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.markdown-container a:hover { text-decoration: underline; }

.markdown-container code {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 0.15rem 0.4rem;
    border-radius: 0.3rem;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.83em;
    color: var(--info);
}

/* ——— Alerts ——— */
.alert {
    border-radius: var(--radius);
    border-width: 1px;
}

/* ——— Animaciones ——— */
.fade-in {
    animation: fadeIn 0.5s ease-out both;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.slide-in-left {
    animation: slideInLeft 0.5s ease-out both;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-24px); }
    to   { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.5s ease-out both;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(24px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* Spinner */
@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fa-spin { animation: spin 0.8s linear infinite; }

/* Glow / pulse */
.glow {
    box-shadow: 0 0 24px var(--accent-glow);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50%       { transform: scale(1.05); }
}

.pulse { animation: pulse 2s ease-in-out infinite; }

/* ——— Accesibilidad ——— */
.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

.btn:focus-visible,
.form-control:focus-visible,
.form-select:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ——— Responsividad ——— */
@media (max-width: 768px) {
    .hero-section { min-height: 65vh; text-align: center; }
    .hero-section .display-4 { font-size: 2rem; }

    .step-number { width: 50px; height: 50px; font-size: 1.1rem; }

    .timeline { padding-left: 1rem; }
    .timeline::before { left: 0.5rem; }
    .timeline-marker { left: -1.5rem; }
    .timeline-item { padding-left: 1.5rem; }

    .problem-card, .solution-card { padding: 1.5rem; }
}

@media (max-width: 576px) {
    .container { padding-left: 1rem; padding-right: 1rem; }
    .btn-lg { padding: 0.65rem 1.4rem; font-size: 0.95rem; }
    .card-body { padding: 1.5rem !important; }
}

/* ——— Print ——— */
@media print {
    .navbar, .footer, .btn { display: none !important; }
    body { background: white !important; color: black !important; }
    .card { border: 1px solid #ccc !important; box-shadow: none !important; }
}