/* =========================================
           VARIABLES DE COLOR (TEMA)
           ========================================= */
        :root {
            /* MODO CLARO */
            --bg-body: #f7f7f7;
            --bg-card: #FFFFFF;
            --bg-input: #FFFFFF;
            --text-main: #333333;
            --text-label: #6B7280;
            --border-color: #E0E2E7;
            --primary-color: #1A3050;
            /* Updated as requested */
            --accent-color: #1A3050;
            --shadow-color: rgba(0, 0, 0, 0.12);
            --header-text: #212529;
            --info-bg: #e6f4ea;
            --info-text: #1e4620;
            --info-border: #c6e7d0;

            /* Toggle Light (Grey & Dark Blue #1A3050) */
            --toggle-bg: #F3F4F6;
            --toggle-border: #E5E7EB;
            --toggle-icon-inactive: #6B7280;
            --toggle-icon-active: #FFFFFF;
            --toggle-bg-active: #1A3050;
            --toggle-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);

            /* Chevron Light (SVG encoded color #333) */
            --chevron-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23333333' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
        }

        /* MODO OSCURO */
        body.dark-mode {
            --bg-body: #0d1117;
            --bg-card: #161b22;
            --bg-input: #0d1117;
            --text-main: #c9d1d9;
            --text-label: #8b949e;
            --border-color: #30363d;
            --primary-color: #3FACC3;
            /* Updated as requested */
            --accent-color: #58a6ff;
            --shadow-color: rgba(0, 0, 0, 0.5);
            --header-text: #f0f6fc;
            --info-bg: #1f6feb26;
            --info-text: #58a6ff;
            --info-border: #1f6feb66;

            /* Toggle Dark (Dark & Teal #3FACC3) */
            --toggle-bg: #161b22;
            --toggle-border: #30363d;
            --toggle-icon-inactive: #8b949e;
            --toggle-icon-active: #FFFFFF;
            /* White icon on Teal */
            --toggle-bg-active: #3FACC3;
            --toggle-shadow: 0 3px 6px rgba(0, 0, 0, 0.3);

            /* Chevron Dark (SVG encoded color #FFF) */
            --chevron-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
        }

        /* =========================================
           ESTILOS GENERALES
           ========================================= */
        body {
            font-family: 'Inter', sans-serif;
            margin: 0;
            padding: 0;
            color: var(--text-main);
            background-color: var(--bg-body);
            display: flex;
            justify-content: center;
            align-items: flex-start;
            min-height: 100vh;
            transition: background-color 0.3s, color 0.3s;
        }

        .container {
            z-index: 10;
            background-color: var(--bg-card);
            border-radius: 12px;
            box-shadow: 0 8px 30px var(--shadow-color);
            margin: 40px auto;
            max-width: 600px;
            width: 95%;
            overflow: hidden;
            transition: background-color 0.3s, box-shadow 0.3s;
        }

        .card-image-banner {
            height: 140px;
            width: 100%;
            background-image: url('img/fondo.jpg');
            background-size: cover;
            background-position: center;
        }

        .form-content {
            padding: 30px;
        }

        .internal-header {
            display: flex;
            align-items: center;
            margin-bottom: 30px;
        }

        .internal-header img {
            height: 40px;
            margin-right: 15px;
        }

        .internal-header h1 {
            font-size: 24px;
            font-weight: 700;
            margin: 0;
            color: var(--header-text);
        }

        h2 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 0;
            margin-bottom: 20px;
            color: var(--header-text);
        }

        h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-label);
            margin-top: 30px;
            margin-bottom: 15px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* FORMULARIOS */
        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-label);
            margin-bottom: 8px;
        }

        input[type="text"],
        input[type="email"],
        select {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 15px;
            box-sizing: border-box;
            background-color: var(--bg-input);
            color: var(--text-main);
            transition: border-color 0.2s, box-shadow 0.2s, background-color 0.3s;
        }

        input:focus,
        select:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(26, 48, 80, 0.2);
        }

        /* --- STYLING DEL SELECT (CHEVRON CUSTOM) --- */
        select {
            appearance: none;
            /* Quita la flecha por defecto */
            -webkit-appearance: none;
            -moz-appearance: none;
            background-image: var(--chevron-icon);
            background-repeat: no-repeat;
            background-position: right 14px center;
            background-size: 16px;
            padding-right: 40px;
            /* Espacio para que el texto no toque la flecha */
            cursor: pointer;
        }

        input[readonly] {
            opacity: 0.7;
            cursor: not-allowed;
            background-color: rgba(0, 0, 0, 0.05);
        }

        /* BOTONES */
        button {
            background-color: var(--primary-color);
            color: white;
            padding: 14px 20px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            width: 100%;
            margin-top: 30px;
            transition: background-color 0.2s;
        }

        button:hover {
            filter: brightness(1.1);
        }

        button:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            background-color: rgba(0, 0, 0, 0.05);
        }

        /* MENSAJES */
        .message {
            margin-top: 20px;
            padding: 15px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            display: flex;
            align-items: center;
        }

        .message.error {
            background-color: #fef2f2;
            color: #991b1b;
            border: 1px solid #fecaca;
        }

        .message.success {
            background-color: #f0fdf4;
            color: #166534;
            border: 1px solid #bbf7d0;
        }

        .message::before {
            margin-right: 10px;
            font-size: 18px;
        }

        .message.error::before {
            content: '❌';
        }

        .message.success::before {
            content: '✅';
        }

        #fixedAccessMessage {
            margin-top: 25px;
            background-color: var(--info-bg);
            color: var(--info-text);
            border: 1px solid var(--info-border);
        }

        #fixedAccessMessage::before {
            content: 'ℹ️';
        }

        /* SECCIONES OCULTAS */
        #registration-details,
        #dynamicOptionsSection,
        .zone-select,
        .fixed-zone-text,
        #fixedAccessMessage {
            display: none;
        }

        /* LISTA DE ETAPAS */
        #stagesList {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
        }

        .stage-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 15px 20px;
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.2s;
        }

        .stage-row:last-child {
            border-bottom: none;
        }

        .stage-row:hover {
            background-color: rgba(0, 0, 0, 0.03);
        }

        .stage-left-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .stage-check {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: var(--primary-color);
        }

        .stage-left-group label {
            margin-bottom: 0;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            cursor: pointer;
        }

        .zone-select {
            width: auto;
            min-width: 140px;
        }

        .fixed-zone-text {
            display: none;
            padding: 8px 16px;
            background-color: rgba(0, 0, 0, 0.05);
            color: var(--text-label);
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid var(--border-color);
            text-align: center;
            min-width: 120px;
        }

        /* =========================================
           SELECTOR DE TEMA - DISEÑO CORREGIDO
           ========================================= */
        .theme-toggle-container {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1000;

            /* Fondo y borde */
            background-color: var(--toggle-bg);
            border: 1px solid var(--toggle-border);
            box-shadow: var(--toggle-shadow);

            /* Forma de cápsula */
            border-radius: 9999px;
            /* Pill total */

            /* Layout FLEX ajustado sin espacio extra */
            display: inline-flex;
            align-items: center;

            /* Padding mínimo para que el círculo casi toque el borde */
            padding: 2px;

            /* Reset de altura de línea para evitar espacio fantasma */
            line-height: 0;

            gap: 2px;
            /* Pequeña separación entre botones */
            transition: all 0.3s ease;
        }

        .theme-toggle-input {
            display: none;
        }

        .theme-toggle-label {
            /* Dimensiones fijas para círculo perfecto */
            width: 28px;
            height: 28px;

            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;

            color: var(--toggle-icon-inactive);
            transition: all 0.2s ease;

            /* Override global label style */
            margin-bottom: 0;

            /* Evitar selección de texto */
            user-select: none;
            -webkit-user-select: none;
        }

        .theme-toggle-label:hover {
            color: var(--text-main);
            background-color: rgba(255, 255, 255, 0.05);
        }

        .theme-toggle-icon {
            width: 14px;
            height: 14px;
            fill: none;
            /* Iconos de línea */
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
            display: block;
            /* Elimina espacio debajo del SVG */
        }

        /* Estado Activo: Círculo Azul Lleno */
        .theme-toggle-input:checked+.theme-toggle-label {
            background-color: var(--toggle-bg-active);
            color: var(--toggle-icon-active);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
        }

        /* =========================================
   MEDIA QUERIES (MOBILE)
   ========================================= */
        @media (max-width: 480px) {
            .container {
                margin: 20px auto;
                width: 92%;
            }

            .form-content {
                padding: 20px;
            }

            .internal-header h1 {
                font-size: 20px;
            }

            .stage-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .stage-left-group {
                width: 100%;
                margin-bottom: 5px;
            }

            .zone-select {
                width: 100%;
                min-width: unset;
            }

            button {
                width: 100%;
            }
        }