/* --- General y variables --- */
:root {
    --bg-color: #f8fafc; --card-bg: #ffffff; --text-primary: #1e293b; --text-secondary: #64748b;
    --border-color: #e2e8f0; --shadow-color-light: rgba(99, 102, 241, 0.08); --primary-color: #4a63e7;
    --primary-hover: #3a53d7; --primary-gradient: linear-gradient(45deg, #4a63e7, #6b4fe8);
    --accent-weak: #ef4444; --accent-medium: #f59e0b; --accent-strong: #10b981; --accent-exposed: #dc2626;
    --page-bg-gradient: linear-gradient(180deg, #f1f5f9 0%, #ffffff 100%);
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); --font-family-primary: 'Montserrat', sans-serif; --font-family-secondary: 'Inter', sans-serif;
}
body.dark-mode {
    --bg-color: #0f172a; --card-bg: #1e293b; --text-primary: #f1f5f9; --text-secondary: #94a3b8;
    --border-color: #334155; --shadow-color-light: rgba(0, 0, 0, 0.25); --primary-color: #5875ff;
    --primary-hover: #6a85ff; --primary-gradient: linear-gradient(45deg, #5875ff, #8a6fff);
    --page-bg-gradient: linear-gradient(180deg, #0f172a 0%, #1a243d 100%);
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.25), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-family-secondary); background-color: var(--bg-color); color: var(--text-primary); transition: var(--transition); min-height: 100vh; line-height: 1.6; }
.page-background { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-image: var(--page-bg-gradient); z-index: -1; transition: var(--transition); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* --- Encabezado y navegación --- */
.page-header { position: fixed; top: 1.5rem; left: 50%; transform: translateX(-50%); z-index: 1000; display: flex; align-items: center; gap: 1rem; width: 95%; max-width: 800px; }
.app-switcher { flex-grow: 1; }
.toggle-switch { position: relative; display: inline-flex; align-items: center; background-color: var(--card-bg); border-radius: 50px; padding: 5px; border: 1px solid var(--border-color); cursor: pointer; box-shadow: var(--card-shadow); user-select: none; height: 50px; }
.toggle-switch input { display: none; }
.toggle-switch .slider { position: absolute; top: 5px; left: 5px; height: 40px; width: calc(50% - 5px); background: var(--primary-gradient); border-radius: 50px; transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55); }
.toggle-switch input:checked + .slider { transform: translateX(calc(100%)); }
.toggle-switch .label-text { position: relative; z-index: 1; color: var(--text-secondary); font-weight: 600; padding: 0 25px; transition: color 0.3s ease; display: flex; align-items: center; gap: 0.5rem; }
.toggle-switch input:not(:checked) ~ .generator-label, .toggle-switch input:checked ~ .verifier-label { color: white; }
.controls { display: flex; gap: 0.75rem; }
.control-btn { background: var(--card-bg); border: 1px solid var(--border-color); color: var(--text-secondary); font-size: 1.1rem; cursor: pointer; padding: 0.6rem; border-radius: 12px; width: 50px; height: 50px; display: flex; align-items: center; justify-content: center; transition: var(--transition); box-shadow: var(--card-shadow); }
.control-btn:hover { color: var(--primary-color); transform: translateY(-2px); }

/* --- Contenido principal y contenedores --- */
main { width: 100%; max-width: 800px; margin: 0 auto; padding: 8rem 1.5rem 2rem; }
.app-view { display: none; }
.app-view.active { display: block; animation: fadeIn 0.6s ease-out forwards; }
.app-container, .extra-section { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 20px; padding: clamp(1.5rem, 5vw, 2.5rem); box-shadow: var(--card-shadow); margin-bottom: 2rem; transition: var(--transition); }
h1 { font-size: clamp(1.9rem, 5vw, 2.5rem); font-weight: 800; text-align: center; margin: 0 0 1rem 0; line-height: 1.2; letter-spacing: -0.025em; font-family: var(--font-family-secondary); }
h2 { font-size: 1.75rem; text-align: center; margin-bottom: 0.5rem; }
.subtitle { text-align: center; color: var(--text-secondary); line-height: 1.6; margin: 0 auto 2.5rem auto; max-width: 600px; font-size: 1.1rem; }

/* --- Estilos específicos del generador de contraseñas --- */
.gen-password-display-container { display: flex; align-items: center; gap: 5px; background: var(--bg-color); border: 2px solid var(--border-color); border-radius: 16px; padding: 8px 12px; margin-bottom: 5px; }
#passwordOutput { flex-grow: 1; border: none; background: transparent; height: 40px; font-size: 1.3em; font-weight: 700; color: var(--text-primary); outline: none; font-family: var(--font-family-primary); }
.gen-icon-btn { background: none; border: none; cursor: pointer; padding: 8px; border-radius: 50%; transition: var(--transition); font-size: 1.2em; color: var(--text-secondary); }
.gen-icon-btn:hover { background: var(--border-color); color: var(--primary-color); transform: scale(1.1); }
.gen-complexity-check { font-size: .9em; font-weight: 600; height: 20px; display: flex; align-items: center; margin-bottom: 10px; padding-left: 5px; }
.gen-complexity-check.error { color: var(--accent-weak); } .gen-complexity-check.warning { color: var(--accent-medium); } .gen-complexity-check.success { color: var(--accent-strong); }
.gen-strength-meter-container { height: 8px; background: var(--border-color); border-radius: 4px; margin-bottom: 18px; overflow: hidden; }
.gen-strength-bar { height: 100%; border-radius: 4px; transition: width .5s ease-out,background-color .5s ease; }
.gen-options-container { margin-top: 15px; }
.gen-type-selector { display: flex; margin-bottom: 18px; background: var(--bg-color); border-radius: 8px; padding: 5px; }
.gen-type-selector button { flex: 1; padding: 12px; border: none; background: transparent; border-radius: 6px; cursor: pointer; font-size: 1em; font-weight: 600; color: var(--text-secondary); transition: var(--transition); }
.gen-type-selector button.active { background: var(--primary-gradient); color: #fff; box-shadow: 0 4px 10px rgba(74,99,231,.3); }
.gen-slider-wrapper { display: flex; align-items: center; gap: 15px; margin-top: 8px; }
.gen-slider-wrapper span { color: var(--text-secondary); }
.gen-slider-value { color: var(--text-primary); font-weight: 700; background: var(--bg-color); padding: 2px 8px; border-radius: 4px; }
input[type=range] { flex-grow: 1; -webkit-appearance: none; height: 6px; background: var(--border-color); outline: none; border-radius: 3px; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; background: var(--primary-color); border-radius: 50%; cursor: pointer; transition: transform .2s ease; }
input[type=range]:hover::-webkit-slider-thumb { transform: scale(1.2); }
.gen-checkbox-group { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin-top: 1rem; }
.gen-checkbox-item { background: var(--bg-color); border: 1px solid var(--border-color); border-radius: 8px; padding: 10px; display: flex; align-items: center; justify-content: center; }
.gen-checkbox-item label { cursor: pointer; display: flex; align-items: center; gap: 8px; font-weight: 600; }
.gen-checkbox-item input[type=checkbox] { display: none; }
.gen-checkbox-item label::before { content: ''; display: inline-block; width: 18px; height: 18px; border: 2px solid var(--text-secondary); border-radius: 4px; transition: var(--transition); }
.gen-checkbox-item input:checked + label::before { background: var(--primary-gradient); border-color: transparent; content: '✓'; color: #fff; text-align: center; line-height: 16px; font-weight: bold; }
.gen-form-group select { width: 100%; background: var(--bg-color); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 4px; padding: 8px; font-size: 1rem; }
.gen-local-security-message { font-size: .8em; color: var(--text-secondary); text-align: center; padding: 10px; background: var(--bg-color); border-radius: 8px; margin-top: 20px; }

/* --- Sección de Historial --- */
#passwordHistoryList { text-align: left; max-height: 300px; overflow-y: auto; margin-top: 20px; padding: 5px; }
.no-history-message { color: var(--text-secondary); text-align: center; padding: 2rem; }
.history-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 5px; border-bottom: 1px solid var(--border-color); }
.history-item:last-child { border-bottom: none; }
.history-password { font-weight: 600; flex-grow: 1; margin-right: 10px; overflow-wrap: break-word; word-break: break-all; font-family: var(--font-family-primary); }
.history-item-actions button { background: none; border: none; color: var(--text-secondary); cursor: pointer; font-size: 1.1em; padding: 5px; transition: color .2s ease; }
.history-item-actions button:hover { color: var(--primary-color); }
.history-actions-footer { display: flex; gap: 10px; justify-content: center; margin-top: 20px; }
.action-btn.clear-btn { background: var(--accent-weak); }

/* --- Cuadrícula de sugerencias --- */
.tips-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-top: 20px; }
.tip-card { background: var(--bg-color); padding: 20px; border-radius: 12px; text-align: center; }
.tip-card h3 { margin-top: 0; margin-bottom: 0.5rem; }
.icon-circle { width: 50px; height: 50px; border-radius: 50%; background: var(--primary-gradient); color: #fff; display: flex; align-items: center; justify-content: center; margin: 0 auto 15px; font-size: 1.5em; }

/* --- Estilos específicos del verificador de contraseña --- */
.ver-password-wrapper { position: relative; margin-bottom: 1.5rem; }
#passwordInput { width: 100%; height: 60px; padding: 0 60px 0 20px; font-size: 1.1rem; background-color: var(--card-bg); color: var(--text-primary); border: 2px solid var(--border-color); border-radius: 16px; transition: var(--transition); font-weight: 500; }
#passwordInput:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 4px rgba(74, 99, 231, 0.15); }
#passwordInput::placeholder { color: var(--text-secondary); font-weight: normal; }
.ver-eye-icon { position: absolute; top: 50%; right: 20px; transform: translateY(-50%); cursor: pointer; color: var(--text-secondary); font-size: 1.2rem; transition: var(--transition); padding: 8px; border-radius: 8px; }
.ver-eye-icon:hover { color: var(--primary-color); background-color: rgba(74, 99, 231, 0.1); }
.ver-strength-bar-container { height: 6px; background-color: var(--border-color); border-radius: 3px; overflow: hidden; margin-bottom: 1.75rem; }
.ver-strength-bar { height: 100%; width: 0; border-radius: 3px; transition: width 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.5s ease; }
.ver-criteria { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.25rem; margin-bottom: 2.5rem; color: var(--text-secondary); font-size: 0.95rem; }
.ver-criterion { display: flex; align-items: center; gap: 0.75rem; transition: var(--transition); }
.ver-criterion span:first-child { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; background-color: var(--bg-color); border: 1.5px solid var(--border-color); border-radius: 50%; color: transparent; font-size: 0.7rem; transition: var(--transition); }
.ver-criterion.active { color: var(--text-primary); font-weight: 500; }
.ver-criterion.active span:first-child { background-color: var(--accent-strong); border-color: var(--accent-strong); color: white; box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2); }
.ver-criterion.exposed span:first-child { background-color: var(--accent-exposed); border-color: var(--accent-exposed); color: white; box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.2); }
.ver-message-box { display: none; align-items: center; border-radius: 16px; padding: 1.5rem; margin-bottom: 1.75rem; text-align: left; animation: slideIn 0.4s ease-out; transition: var(--transition); border: 1px solid transparent; }
@keyframes slideIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.ver-message-box.exposed { background-color: #fef3f2; color: #b91c1c; border-color: rgba(239, 68, 68, 0.2); }
body.dark-mode .ver-message-box.exposed { background-color: rgba(127, 29, 29, 0.2); color: #fecaca; border-color: rgba(127, 29, 29, 0.4); }
.ver-message-box.exposed .icon-circle { background-color: var(--accent-exposed); }
.ver-message-box.weak { background-color: #fffbeb; color: #b45309; border-color: rgba(245, 158, 11, 0.2); }
body.dark-mode .ver-message-box.weak { background-color: rgba(113, 63, 18, 0.2); color: #fde68a; border-color: rgba(113, 63, 18, 0.4); }
.ver-message-box.weak .icon-circle { background-color: var(--accent-medium); }
.ver-message-box.success { background-color: #f0fdf4; color: #166534; border-color: rgba(16, 185, 129, 0.2); }
body.dark-mode .ver-message-box.success { background-color: rgba(6, 95, 70, 0.2); color: #bbf7d0; border-color: rgba(6, 95, 70, 0.4); }
.ver-message-box.success .icon-circle { background-color: var(--accent-strong); }
.ver-message-box .icon-circle { color: white; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; width: 36px; height: 36px; border-radius: 50%; margin-right: 1.25rem; flex-shrink: 0; }
.ver-message-content h3 { margin: 0 0 0.5rem 0; font-size: 1.1rem; font-weight: 600; }
.ver-message-content p { margin: 0; font-size: 0.95rem; opacity: 0.9; }
.ver-checking-exposure { display: flex; align-items: center; gap: 0.5rem; color: var(--text-secondary); font-size: 0.9rem; margin: -1.5rem 0 1.5rem; justify-content: center;}
.ver-checking-exposure .spinner { width: 16px; height: 16px; border: 2px solid transparent; border-top: 2px solid var(--primary-color); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }
.action-btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; color: #fff; text-decoration: none; font-weight: 600; transition: var(--transition); padding: 0.75rem 1.5rem; border-radius: 12px; border: none; cursor: pointer; background: var(--primary-gradient); }
.action-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px var(--shadow-color-light); }
.ver-actions-container { text-align: center; }

/* --- Preguntas frecuentes / Secciones compartidas --- */
.faq-list { margin-top: 20px; border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden; }
.faq-item { border-bottom: 1px solid var(--border-color); }
.faq-item:last-child { border-bottom: none; }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; cursor: pointer; font-weight: 600; }
.faq-toggle { transition: transform 0.3s ease; }
.faq-item.active .faq-toggle { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease-out; }
.faq-answer p { padding: 0 20px 15px; border-top: 1px solid var(--border-color); margin: 0; color: var(--text-secondary); text-align: left; }
.faq-item.active .faq-answer { max-height: 200px; }

/* --- Pie de página --- */
footer {
    text-align: center;
    padding: 2rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    width: 100%;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex; 
    justify-content: space-between; 
    align-items: center; /* Centra verticalmente los elementos */
    flex-wrap: wrap; 
    gap: 1.5rem; /* Espacio entre columnas */
    max-width: 800px;
    margin: 0 auto 1.5rem auto; 
}

.footer-column {
    display: flex;
    align-items: center;
    gap: 0.5rem; 
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

footer a:hover {
    text-decoration: underline;
}

.open-source-msg {
    margin-top: 1.5rem;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* --- Estilos para pantallas pequeñas (Móviles) --- */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column; /* Apila las columnas verticalmente */
        gap: 1rem; /* Reduce el espacio en móviles */
    }
}

/* --- Modales y mensajes --- */
.copy-message { position: fixed; left: 50%; bottom: 50px; transform: translateX(-50%); background: var(--accent-strong); color: #fff; padding: 10px 20px; border-radius: 8px; font-weight: 600; opacity: 0; transition: all .4s ease; pointer-events: none; z-index: 9999; }
.copy-message.show { opacity: 1; transform:translateX(-50%) translateY(-20px) }
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); backdrop-filter: blur(5px); display: none; align-items: center; justify-content: center; z-index: 2000; opacity: 0; transition: opacity 0.3s ease; padding: 1.5rem; }
.modal-overlay.active { display: flex; opacity: 1; }
.modal-content { background: var(--card-bg); padding: 2.5rem; border-radius: 20px; max-width: 640px; width: 100%; position: relative; transform: scale(0.95); transition: transform 0.3s ease; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); border: 1px solid var(--border-color); max-height: 80vh; overflow-y: auto; }
/* --- Estilos específicos modales QR --- */
#qr-modal .modal-content {
    max-width: 300px; 
    text-align: center;
    padding: 1.5rem;
}

#qrcode-container {
    padding: 1rem;
    background-color: #fff; 
    border-radius: 8px;
    display: inline-block; 
    margin-top: 1rem;
}

#qrcode-container img {
    display: block; 
    max-width: 100%;
    height: auto;
}
.modal-overlay.active .modal-content { transform: scale(1); }
.modal-content h2 { margin-top: 0; margin-bottom: 1.5rem; font-size: 1.75rem; font-weight: 700; }
.modal-content p { line-height: 1.7; color: var(--text-secondary); margin-bottom: 1.25rem; }
.close-btn { position: absolute; top: 1.25rem; right: 1.25rem; background: none; border: none; font-size: 1.8rem; cursor: pointer; color: var(--text-secondary); transition: var(--transition); width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 8px; }
.close-btn:hover { color: var(--accent-weak); background-color: rgba(239, 68, 68, 0.1); }
#ai-response-content .spinner-container { text-align: center; padding: 2rem; }
#ai-response-content .spinner { margin: 0 auto 1rem; width: 40px; height: 40px; border: 4px solid var(--border-color); border-top-color: var(--primary-color); border-radius: 50%; animation: spin 1s linear infinite; }
#ai-response-content h3 { margin-top: 1.5rem; margin-bottom: 0.5rem; font-size: 1.2rem; }
#ai-response-content ul { list-style: none; padding-left: 0; }
#ai-response-content li { background-color: var(--bg-color); padding: 1rem; border-radius: 8px; margin-bottom: 0.5rem; border-left: 3px solid var(--primary-color); }
#ai-response-content li code { font-family: monospace; background: var(--border-color); padding: 2px 5px; border-radius: 4px; }

/* --- Ajustes responsivos --- */
@media (max-width: 768px) {
    main { padding: 6rem 1rem 1.5rem; }
    .page-header { top: 1rem; width: calc(100% - 2rem); }
    .toggle-switch .label-text { padding: 0 15px; }
    .toggle-switch .label-text span { display: none; }
}