/* --- SISTEMA DE DISEÑO Y CONFIGURACIÓN --- */
 :root {
    --bg-color: #f8fafc;
    /* Slate 50 */
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    /* Slate 900 */
    --text-secondary: #475569;
    /* Slate 600 */
    --primary-color: #4f46e5;
    /* Indigo 600 */
    --primary-hover: #4338ca;
    /* Indigo 700 */
    --primary-light: #e0e7ff;
    /* Indigo 100 */
    --accent-color: #7c3aed;
    /* Violet 600 */
    --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --border-color: #e2e8f0;
    /* Slate 200 */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-sticky: 0 12px 20px -8px rgba(79, 70, 229, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark-theme {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    --primary-light: rgba(99, 102, 241, 0.15);
    --border-color: #334155;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-sticky: 0 12px 20px -8px rgba(99, 102, 241, 0.15);
}

body.dark-theme header {
    background-color: rgba(30, 41, 59, 0.85);
}

body.dark-theme .font-name {
    background-color: #334155;
}

body.dark-theme #clear-btn {
    background: #334155;
}

body.dark-theme #clear-btn:hover {
    background: #475569;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.55rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.theme-toggle-btn svg {
    width: 20px;
    height: 20px;
}

body.dark-theme .theme-toggle-btn .moon-icon {
    display: none;
}

body:not(.dark-theme) .theme-toggle-btn .sun-icon {
    display: none;
}

 /* --- ESTILOS GENERALES --- */
 * {
     box-sizing: border-box;
     margin: 0;
     padding: 0;
 }

 body {
     font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
     background-color: var(--bg-color);
     color: var(--text-primary);
     min-height: 100vh;
     display: flex;
     flex-direction: column;
     overflow-x: hidden;
     -webkit-font-smoothing: antialiased;
 }

 a {
     color: inherit;
     text-decoration: none;
 }

 /* --- CABECERA (HEADER) --- */
 header {
     background-color: rgba(255, 255, 255, 0.85);
     backdrop-filter: blur(12px);
     -webkit-backdrop-filter: blur(12px);
     border-bottom: 1px solid var(--border-color);
     position: sticky;
     top: 0;
     z-index: 1000;
     transition: var(--transition-smooth);
 }

 .header-container {
     max-width: 1200px;
     margin: 0 auto;
     padding: 1rem 1.5rem;
     display: flex;
     justify-content: space-between;
     align-items: center;
 }

 .logo {
     display: flex;
     align-items: center;
     gap: 0.75rem;
     font-size: 1.5rem;
     font-weight: 700;
     color: var(--text-primary);
     letter-spacing: -0.025em;
 }

 .logo svg {
     width: 32px;
     height: 32px;
     fill: url(#logo-grad);
 }

 .logo-text span {
     background: var(--accent-gradient);
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
 }

 .nav-links {
     display: flex;
     gap: 1.5rem;
     list-style: none;
     font-weight: 500;
     color: var(--text-secondary);
 }

 .nav-links a {
     transition: var(--transition-smooth);
     padding: 0.5rem 0.75rem;
     border-radius: var(--radius-sm);
 }

 .nav-links a:hover {
     color: var(--primary-color);
     background-color: var(--primary-light);
 }

 /* --- CONTENEDOR PRINCIPAL --- */
 main {
     flex: 1;
     max-width: 1000px;
     width: 100%;
     margin: 0 auto;
     padding: 3rem 1.5rem;
 }

 /* --- SECCIÓN HERO --- */
 .hero {
     text-align: center;
     margin-bottom: 3rem;
     position: relative;
 }

 .hero::before {
     content: '';
     position: absolute;
     top: -100px;
     left: 50%;
     transform: translateX(-50%);
     width: 300px;
     height: 300px;
     background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(248, 250, 252, 0) 70%);
     z-index: -1;
     pointer-events: none;
 }

 h1 {
     font-size: 2.75rem;
     font-weight: 800;
     line-height: 1.2;
     margin-bottom: 1.25rem;
     background: linear-gradient(135deg, #1e1b4b 0%, #4338ca 100%);
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     letter-spacing: -0.03em;
 }

 .hero p {
     font-size: 1.15rem;
     line-height: 1.6;
     color: var(--text-secondary);
     max-width: 680px;
     margin: 0 auto;
     font-weight: 400;
 }

 /* --- COMPONENTE DE ENTRADA ADHERENTE (STICKY INPUT) --- */
 .sticky-input-wrapper {
     position: sticky;
     top: 68px;
     /* Altura de la cabecera aprox. */
     z-index: 900;
     padding: 1.5rem 0;
     background-color: var(--bg-color);
     transition: var(--transition-smooth);
     margin-bottom: 2.5rem;
 }

 .sticky-input-wrapper.is-sticky {
     padding: 1rem 0;
     background-color: rgba(248, 250, 252, 0.8);
     backdrop-filter: blur(16px);
     -webkit-backdrop-filter: blur(16px);
 }

 .input-container {
     position: relative;
     max-width: 800px;
     margin: 0 auto;
     border-radius: var(--radius-lg);
     background-color: var(--card-bg);
     border: 2px solid var(--border-color);
     box-shadow: var(--shadow-md);
     transition: var(--transition-smooth);
     display: flex;
     align-items: center;
 }

 .sticky-input-wrapper.is-sticky .input-container {
     box-shadow: var(--shadow-sticky);
     border-color: rgba(79, 70, 229, 0.3);
 }

 .input-container:focus-within {
     border-color: var(--primary-color);
     box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
     transform: scale(1.01);
 }

 #font-input {
     width: 100%;
     border: none;
     background: transparent;
     padding: 1.25rem 3.5rem 1.25rem 1.5rem;
     font-family: inherit;
     font-size: 1.35rem;
     font-weight: 500;
     color: var(--text-primary);
     outline: none;
 }

 #font-input::placeholder {
     color: #94a3b8;
     font-weight: 400;
 }

 /* Botón Limpiar (X) posicionado en la esquina inferior derecha */
 #clear-btn {
     position: absolute;
     right: 1.25rem;
     background: #f1f5f9;
     border: none;
     color: var(--text-secondary);
     cursor: pointer;
     padding: 0.35rem;
     display: none;
     /* Se activa dinámicamente */
     align-items: center;
     justify-content: center;
     border-radius: 50%;
     transition: var(--transition-smooth);
 }

 #clear-btn:hover {
     background: #e2e8f0;
     color: var(--text-primary);
     transform: rotate(90deg);
 }

 #clear-btn svg {
     width: 16px;
     height: 16px;
 }

 /* --- REJILLA DE RESULTADOS (OUTPUT GRID) --- */
.output-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    /* 2 Columnas en escritorio */
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

/* Tarjetas de fuentes */
.font-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    min-height: 140px;
    min-width: 0;
}

 .font-card:hover {
     transform: translateY(-4px);
     box-shadow: var(--shadow-lg);
     border-color: rgba(79, 70, 229, 0.2);
 }

 .card-header {
     display: flex;
     justify-content: space-between;
     align-items: center;
     margin-bottom: 1rem;
 }

 .font-name {
     font-size: 0.8rem;
     font-weight: 700;
     color: var(--text-secondary);
     text-transform: uppercase;
     letter-spacing: 0.05em;
     background-color: #f1f5f9;
     padding: 0.25rem 0.6rem;
     border-radius: 4px;
 }

 /* Botón Copiar */
 .copy-btn {
     position: relative;
     background-color: var(--primary-light);
     color: var(--primary-color);
     border: none;
     padding: 0.45rem 0.9rem;
     border-radius: var(--radius-sm);
     font-size: 0.85rem;
     font-weight: 600;
     cursor: pointer;
     display: flex;
     align-items: center;
     gap: 0.35rem;
     transition: var(--transition-smooth);
 }

 .copy-btn:hover {
     background-color: var(--primary-color);
     color: #ffffff;
 }

 .copy-btn svg {
     width: 14px;
     height: 14px;
 }

 /* Toast flotante micro-popup */
 .copy-toast {
     position: absolute;
     bottom: 125%;
     left: 50%;
     transform: translateX(-50%) translateY(6px);
     background-color: #0f172a;
     color: #ffffff;
     font-size: 0.75rem;
     font-weight: 600;
     padding: 0.35rem 0.75rem;
     border-radius: 4px;
     white-space: nowrap;
     opacity: 0;
     pointer-events: none;
     transition: opacity 0.2s ease, transform 0.2s ease;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
     z-index: 10;
 }

 .copy-toast::after {
     content: '';
     position: absolute;
     top: 100%;
     left: 50%;
     transform: translateX(-50%);
     border-width: 5px;
     border-style: solid;
     border-color: #0f172a transparent transparent transparent;
 }

 .copy-btn.show-toast .copy-toast {
     opacity: 1;
     transform: translateX(-50%) translateY(0);
 }

 /* Texto de vista previa */
 .font-preview {
     font-size: 1.45rem;
     color: var(--text-primary);
     line-height: 1.4;
     word-wrap: break-word;
     word-break: break-all;
     margin-top: auto;
     padding: 0.5rem 0;
     font-weight: 500;
     user-select: all;
     cursor: pointer;
     transition: color 0.2s ease;
 }

 .font-preview:hover {
     color: var(--primary-color);
 }

 /* --- BOTÓN CARGAR MÁS --- */
 .load-more-container {
     display: flex;
     justify-content: center;
     margin: 2rem 0;
 }

 .load-more-btn {
     background: var(--accent-gradient);
     color: #ffffff;
     border: none;
     padding: 0.9rem 2rem;
     border-radius: var(--radius-md);
     font-size: 1.05rem;
     font-weight: 600;
     cursor: pointer;
     box-shadow: var(--shadow-md);
     transition: var(--transition-smooth);
     display: flex;
     align-items: center;
     gap: 0.5rem;
 }

 .load-more-btn:hover {
     transform: translateY(-2px);
     box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
 }

 .load-more-btn:active {
     transform: translateY(0);
 }


 /* faq section  */
 .faq-section {
     max-width: 800px;
     margin: 40px auto;
     padding: 10px;
 }

 .faq-section h2 {
     text-align: center;
     margin-bottom: 20px;
 }

 .faq-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--card-bg);
    transition: 0.3s;
}

.faq-question {
    padding: 12px 15px;
    cursor: pointer;
    font-weight: 600;
    position: relative;
    font-size: 1.125rem;
    font-weight: 600;
}

.faq-question:hover {
    background: var(--primary-light);
}

/* arrow icon */
.faq-question::after {
    content: "›";
    position: absolute;
    right: 15px;
    font-size: 20px;
    transform: rotate(90deg);
    transition: transform 0.3s ease;
}

.faq-item.active {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* rotate when active */
.faq-item.active .faq-question::after {
    transform: rotate(270deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 15px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: 0.3s ease;
}

 .faq-item.active .faq-answer {
     max-height: 300px;
     padding: 1px 15px 50px;
 }


 /* --- PIE DE PÁGINA (FOOTER) --- */
 footer {
     background-color: #0f172a;
     color: #94a3b8;
     border-top: 1px solid #1e293b;
     padding: 3rem 1.5rem;
     font-size: 0.95rem;
 }

 .footer-container {
     max-width: 1200px;
     margin: 0 auto;
     display: flex;
     flex-direction: column;
     gap: 2rem;
 }

 .footer-top {
     display: flex;
     justify-content: space-between;
     align-items: center;
     flex-wrap: wrap;
     gap: 1.5rem;
     border-bottom: 1px solid #1e293b;
     padding-bottom: 2rem;
 }

 .footer-logo {
     font-size: 1.35rem;
     font-weight: 700;
     color: #ffffff;
     display: flex;
     align-items: center;
     gap: 0.5rem;
 }

 .footer-logo svg {
     width: 24px;
     height: 24px;
     fill: #6366f1;
 }

 .footer-links {
     display: flex;
     gap: 1.5rem;
     list-style: none;
 }

 .footer-links a {
     transition: var(--transition-smooth);
 }

 .footer-links a:hover {
     color: #ffffff;
 }

 .footer-bottom {
     display: flex;
     justify-content: space-between;
     align-items: center;
     flex-wrap: wrap;
     gap: 1rem;
     font-size: 0.85rem;
 }

 /* --- CLASE PARA MOSTRAR GÓTICO NATIVO EN LA WEB --- */
 .font-gothic-display {
     font-family: 'UnifrakturMaguntia', 'Outfit', serif;
     font-size: 1.65rem;
     letter-spacing: 0.01em;
 }

 .social-icons {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
}

.social-icons a {
    display: inline-flex;
    width: 35px;
    height: 35px;
    background: #222;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.social-icons svg {
    width: 18px;
    height: 18px;
    fill: #fff;
}

.social-icons a:hover {
    background: #444;
}

 /* --- BOTÓN HAMBURGUESA (HAMBURGER BUTTON) --- */
 .hamburger-btn {
     margin-left: 56px;
     display: none;
     background: none;
     border: none;
     color: var(--text-primary);
     cursor: pointer;
     padding: 0.5rem;
     border-radius: var(--radius-sm);
     transition: var(--transition-smooth);
     align-items: center;
     justify-content: center;
 }

 .hamburger-btn:hover {
     background-color: var(--primary-light);
     color: var(--primary-color);
 }

 .hamburger-btn svg {
     width: 24px;
     height: 24px;
 }

 /* Animación del menú hamburguesa */
 .hamburger-btn line {
     transition: var(--transition-smooth);
     transform-origin: 12px 12px;
 }

 .hamburger-btn.is-active .line-mid {
     opacity: 0;
     transform: scaleX(0);
 }

 .hamburger-btn.is-active .line-top {
     transform: translateY(6px) rotate(45deg);
 }

 .hamburger-btn.is-active .line-bottom {
     transform: translateY(-3px) rotate(-45deg);
 }


 /* Backlinks Marquee Animation */
 .backlinks-container {
     width: 100%;
     overflow: hidden;
     display: flex;
     flex-direction: column;
     gap: 20px;
     padding: 30px 0;
     margin: 20px 0;
     background: rgba(255, 255, 255, 0.02);
     border-radius: 12px;
 }

 .marquee-track {
     display: flex;
     width: max-content;
 }

 .marquee-track.left {
     animation: scroll-left 30s linear infinite;
 }

 .marquee-track.right {
     animation: scroll-right 30s linear infinite;
 }

 /* Pause on hover */
 .backlinks-container:hover .marquee-track {
     animation-play-state: paused;
 }

 .marquee-content {
     display: flex;
     gap: 30px;
     padding-right: 30px;
     align-items: center;
 }

 .marquee-content a {
     display: flex;
     align-items: center;
     justify-content: center;
     transition: transform 0.3s ease;
 }

 .marquee-content a:hover {
     transform: scale(1.05);
 }

 .marquee-content img {
     border-radius: 8px;
     object-fit: contain;
 }

 @keyframes scroll-left {
     0% {
         transform: translateX(0);
     }

     100% {
         transform: translateX(-50%);
     }
 }

 @keyframes scroll-right {
     0% {
         transform: translateX(-50%);
     }

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

 @media (max-width: 768px) {

     .marquee-track.left,
     .marquee-track.right {
         animation-duration: 20s;
     }

     .marquee-content img {
         height: 40px;
         width: auto;
     }

     .backlinks-container {
         gap: 15px;
     }
 }




 /* --- RESPONSIVIDAD (MOBILE-FIRST BREAKPOINTS) --- */
 @media (max-width: 768px) {

    /* 1 columna en móvil */
    .output-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    h1 {
        font-size: 2rem;
    }

    .sticky-input-wrapper {
        top: 60px;
        /* Ajuste para header más compacto */
        padding: 1rem 0;
    }

    #font-input {
        padding: 1rem 3rem 1rem 1.25rem;
        font-size: 1.15rem;
    }

    .header-container {
        padding: 0.8rem 1rem;
    }

    .hamburger-btn {
        display: flex;
        margin-left: 0.5rem;
    }

    .theme-toggle-btn {
        margin-left: auto;
    }

    .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--card-bg);
        border-bottom: 1px solid var(--border-color);
        padding: 1.5rem;
        gap: 1rem;
        box-shadow: var(--shadow-md);
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition-smooth);
        list-style: none;
    }

    .nav-links.is-active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        width: 100%;
        padding: 0.75rem 1rem;
        text-align: center;
        border-radius: var(--radius-sm);
        background-color: var(--bg-color);
        font-weight: 600;
    }

    .nav-links a:hover {
        background-color: var(--primary-light);
        color: var(--primary-color);
    }

    .font-preview {
        font-size: 1rem;
    }

    main {
        padding: 2rem 1rem;
    }

    .footer-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Desktop layout adjustment for header container */
@media (min-width: 769px) {
    nav {
        margin-left: auto;
        margin-right: 1.5rem;
    }
}