:root {
    /* Paleta G</>O */
    --go-navy: #0a1f3a;
    --go-navy-light: #16325c;
    --go-cyan: #4df0ff;
    --go-cyan-dark: #1dbbcc;
    
    /* Colores funcionales */
    --success: #2ecc71;
    --danger: #e74c3c;
    --warning: #f39c12;
    
    /* Neutros */
    --bg-main: #f8f9fa;
    --bg-card: #ffffff;
    --text-main: #2c3e50;
    --text-light: #7f8c8d;
    --border-color: #e0e5ec;
}

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

body {
    font-family: 'Inter', 'Montserrat', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    transition: background-color 0.4s ease;
}

/* ==================== */
/*      GLOBAL NAVBAR   */
/* ==================== */
.global-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #ffffff;
    padding: 0 40px;
    height: 70px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 100;
}

.nav-brand {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 24px;
    color: var(--go-navy);
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.logo-text {
    letter-spacing: -1px;
}

.cyan-code {
    color: var(--go-cyan);
    text-shadow: 0 0 8px rgba(77, 240, 255, 0.4);
}

.logo-subtitle {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-light);
    border-left: 2px solid var(--border-color);
    padding-left: 10px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-item {
    display: flex;
    align-items: center;
    font-weight: 700;
}

.tokens-indicator {
    background-color: #fff8e1; /* Amarillo suave para los tokens */
    color: #f39c12; /* Color cálido (dorado) para el número */
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid #ffeaa7;
    gap: 8px;
    font-size: 16px;
    display: flex;
    align-items: center;
}

.token-display {
    display: flex;
    align-items: center;
    gap: 5px;
    min-width: 45px;
    justify-content: center;
}

.token-control-btn {
    background: none;
    border: none;
    color: #d1b46a;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    transition: all 0.2s;
}

.token-control-btn:hover {
    background-color: #f39c12;
    color: white;
}

.mobile-tokens-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
    background-color: #fffcf5;
    color: #f39c12;
    font-weight: bold;
    font-size: 18px;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-main);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.2s;
    font-family: 'Montserrat', sans-serif;
}

.nav-btn:hover {
    color: var(--go-navy);
}

.nav-btn.danger {
    color: var(--text-light);
    font-size: 12px;
}
.nav-btn.danger:hover {
    color: var(--danger);
}

.hamburger-btn {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--go-navy);
    cursor: pointer;
}

.app-container {
    flex-grow: 1;
    overflow: hidden;
    position: relative;
}

/* ==================== */
/*   DASHBOARD VIEW     */
/* ==================== */
.dashboard-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    overflow-y: auto;
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.dashboard-header {
    margin-bottom: 40px;
    text-align: center;
}

.dashboard-header h2 {
    font-size: 32px;
    color: var(--go-navy);
    font-weight: 800;
    margin-bottom: 10px;
}

.dashboard-header p {
    font-size: 16px;
    color: var(--text-light);
}

.blocks-grid {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 600px;
    gap: 30px;
    padding-bottom: 40px;
}

.course-card {
    background-color: var(--bg-card);
    border-radius: 2px;
    border: 3px solid #aebac9;
    border-top-color: #e2e8f0;
    border-left-color: #e2e8f0;
    border-bottom-color: #64748b;
    border-right-color: #64748b;
    box-shadow: 8px 8px 15px rgba(0,0,0,0.2);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 12px 12px 20px rgba(0,0,0,0.25);
}

.course-header {
    padding: 20px;
    color: white;
    font-weight: 800;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Colores de los bloques */
.course-card[data-block="1"] .course-header { background: linear-gradient(135deg, var(--go-navy), var(--go-navy-light)); border-bottom: 4px solid var(--go-cyan); }
.course-card[data-block="2"] .course-header { background: linear-gradient(135deg, #2c3e50, #34495e); border-bottom: 4px solid var(--warning); }
.course-card[data-block="3"] .course-header { background: linear-gradient(135deg, #1a252f, #2c3e50); border-bottom: 4px solid var(--danger); }
.course-card[data-block="4"] .course-header { background: linear-gradient(135deg, #0e1a25, var(--go-navy)); border-bottom: 4px solid var(--success); }

.course-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

/* Botones de nivel (Píldoras) */
.level-pill {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    background-color: var(--bg-main);
    border-radius: 2px;
    border: 3px solid #aebac9;
    border-top-color: #ffffff;
    border-left-color: #ffffff;
    border-bottom-color: #64748b;
    border-right-color: #64748b;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 3px 3px 6px rgba(0,0,0,0.1);
}

.level-pill:hover:not(.locked) {
    background-color: #f0f4f8;
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 8px rgba(0,0,0,0.15);
}

.level-pill.locked {
    color: #9ca3af;
    background-color: #f3f4f6;
    cursor: not-allowed;
    border-color: #d1d5db;
    border-top-color: #f9fafb;
    border-left-color: #f9fafb;
    border-bottom-color: #9ca3af;
    border-right-color: #9ca3af;
}

.level-pill.completed {
    background-color: #e6fcfd;
    color: var(--go-navy);
    border-color: var(--go-cyan);
    border-top-color: #bdf6fa;
    border-left-color: #bdf6fa;
    border-bottom-color: #0b8f9e;
    border-right-color: #0b8f9e;
}

.level-pill.active {
    background-color: var(--go-navy);
    color: white;
    border-color: #2c3e50;
    border-top-color: #4a627a;
    border-left-color: #4a627a;
    border-bottom-color: #121c26;
    border-right-color: #121c26;
    box-shadow: 4px 4px 12px rgba(10,31,58,0.3);
}

.level-status-icon {
    font-size: 16px;
}

.level-pill.completed .level-status-icon {
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--go-cyan-dark);
}


/* ==================== */
/*   EXERCISE VIEW      */
/* ==================== */
.exercise-view {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    background-color: var(--bg-main);
}

/* TOP BAR (Ejercicio) */
.exercise-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 40px;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.back-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: color 0.2s;
}
.back-btn:hover { color: var(--go-navy); }

.progress-container {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-grow: 0.5;
    max-width: 400px;
}

.batteries-container {
    display: flex;
    gap: 10px;
    flex-grow: 1;
    align-items: center;
}

.battery {
    display: flex;
    border: 2px solid var(--text-main);
    border-radius: 4px;
    padding: 2px;
    gap: 2px;
    height: 20px;
    position: relative;
    background: var(--bg-main);
}

.battery::after {
    content: '';
    position: absolute;
    right: -4px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 8px;
    background: var(--text-main);
    border-radius: 0 2px 2px 0;
}

.battery-segment {
    width: 8px;
    background-color: var(--border-color);
    border-radius: 1px;
    transition: background-color 0.3s ease;
}

.battery-segment.filled {
    background-color: var(--go-cyan);
    box-shadow: 0 0 4px var(--go-cyan);
}

.remaining-text {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-light);
}

/* LAYOUT PRINCIPAL EJERCICIO */
.exercise-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    padding: 30px 40px;
    flex-grow: 1;
    overflow: hidden;
}

.exercise-left-panel, .exercise-right-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    padding-right: 10px;
}

.exercise-title {
    font-size: 28px;
    font-weight: 800;
    color: var(--go-navy);
    margin-bottom: 15px;
}

.exercise-instruction {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-main);
    margin-bottom: 25px;
}

.instruction-clickable {
    color: var(--go-navy);
    font-weight: 700;
    cursor: pointer;
    background-color: #f0f4f8;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid #d0dbe5;
    transition: all 0.2s;
}

.instruction-clickable:hover {
    background-color: #e0eaf3;
    border-color: var(--go-navy);
}

/* SCHEMA */
.schema-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}

.schema-container h3 {
    font-size: 13px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

.schema-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.schema-tag {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s;
}

.schema-tag:hover {
    border-color: var(--go-navy);
    background-color: #f0f4f8;
}

/* CODE EDITOR (ATARI STYLE - VISION FRIENDLY) */
.code-editor-wrapper {
    display: flex;
    flex-direction: column;
    background-color: #121612; /* Un gris muy oscuro en lugar de negro puro */
    border-radius: 6px;
    border: 2px solid #5aa55a; /* Verde más suave y menos chillón */
    overflow: hidden;
    box-shadow: 0 0 8px rgba(90, 165, 90, 0.15); /* Resplandor más sutil */
    min-height: 250px;
    flex-shrink: 0;
}

.editor-header {
    background-color: #1a201a;
    padding: 8px 15px;
    font-size: 12px;
    color: #5aa55a;
    font-weight: 700;
    font-family: 'Courier New', Courier, monospace;
    border-bottom: 2px solid #5aa55a;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#sql-input {
    width: 100%;
    flex-grow: 1;
    background-color: transparent;
    border: none;
    padding: 20px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 18px;
    font-weight: 600;
    color: #7acc7a; /* Verde ligeramente más claro para el texto para que lea bien */
    text-shadow: 0 0 2px rgba(122, 204, 122, 0.3); /* Brillo muy ligero */
    resize: none;
    outline: none;
    line-height: 1.5;
}

#sql-input::placeholder {
    color: #3b6b3b; /* Verde oscuro para el placeholder */
}

.results-container {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-top: 20px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

#sql-results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

#sql-results-table th, #sql-results-table td {
    padding: 10px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

#sql-results-table th {
    background-color: #f8f9fa;
    color: var(--text-light);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
}

.answer-actions {
    margin-top: 15px;
    text-align: right;
}

.text-link-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
    transition: color 0.2s;
}

.text-link-btn:hover {
    color: var(--go-cyan-dark);
}

/* HINT Y FEEDBACK */
.hint-container {
    padding: 15px;
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--danger);
    border-left: 4px solid var(--danger);
    border-radius: 0 8px 8px 0;
    margin-top: 20px;
    font-size: 14px;
    line-height: 1.5;
}

/* FOOTER EJERCICIO */
.exercise-footer {
    padding: 20px 40px;
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.button-group {
    display: flex;
    gap: 15px;
}

.flat-btn {
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s;
    border: none;
    font-family: 'Montserrat', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.shortcut {
    font-size: 10px;
    opacity: 0.7;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: none;
}

.flat-btn.secondary {
    background-color: var(--bg-main);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.flat-btn.secondary:hover {
    background-color: #eef2f5;
}

.flat-btn.primary {
    background-color: var(--border-color); /* Disabled state initially */
    color: #afafaf;
    pointer-events: none;
}

.flat-btn.primary.active {
    background-color: var(--go-navy);
    color: white;
    pointer-events: auto;
    box-shadow: 0 4px 15px rgba(10,31,58,0.2);
}

.flat-btn.primary.active:hover {
    background-color: var(--go-navy-light);
    transform: translateY(-2px);
}

/* MODALES */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(10, 31, 58, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.close-modal-btn {
    position: absolute;
    right: 20px;
    top: 20px;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-light);
    cursor: pointer;
}

.modal-title {
    color: var(--go-navy);
    margin-bottom: 25px;
    font-size: 22px;
    font-weight: 800;
}

.modal-text {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-main);
    margin-bottom: 15px;
}

.dict-list {
    max-height: 60vh;
    overflow-y: auto;
}

.dict-section {
    color: var(--go-cyan-dark);
    margin: 20px 0 10px 0;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.dict-list ul {
    list-style: none;
}

.dict-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    line-height: 1.5;
}

.dict-list li strong {
    color: var(--go-navy);
    font-family: 'Consolas', monospace;
    background: #f0f4f8;
    padding: 2px 5px;
    border-radius: 4px;
}

/* ==================== */
/*   RESPONSIVE (MÓVIL) */
/* ==================== */
@media (max-width: 900px) {
    .exercise-layout {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }
    
    .exercise-left-panel, .exercise-right-panel {
        overflow-y: visible;
        padding-right: 0;
    }
    
    .code-editor-wrapper {
        min-height: 200px;
    }
}

@media (max-width: 768px) {
    .global-navbar {
        padding: 0 20px;
    }
    
    .nav-links {
        display: none; /* Ocultamos links en móvil */
    }
    
    .hamburger-btn {
        display: block;
    }
    
    .mobile-menu-overlay {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        z-index: 99;
        display: flex;
        flex-direction: column;
        padding: 10px 0;
    }
    
    .mobile-menu-overlay .nav-btn {
        padding: 15px 20px;
        text-align: left;
        border-bottom: 1px solid #eee;
    }
    
    .dashboard-view {
        padding: 20px;
    }
    
    .exercise-top-bar {
        padding: 15px 20px;
    }
    
    .exercise-footer {
        padding: 20px;
        flex-direction: column;
    }
    
    .button-group {
        flex-direction: column-reverse;
    }
    
    .flat-btn {
        width: 100%;
    }
}

/* ==================== */
/*   CATEGORY VIEW      */
/* ==================== */
.category-view {
    height: 100%;
    overflow-y: auto;
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding-bottom: 40px;
}

.category-card {
    background-color: var(--bg-card);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    border: 1px solid var(--border-color);
    padding: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.category-card:not(.disabled):hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
}

.category-card.disabled {
    opacity: 0.7;
    background-color: #f8f9fa;
}

.category-icon {
    font-size: 48px;
    margin-bottom: 20px;
    background: #f0f4f8;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.category-info h3 {
    font-size: 20px;
    color: var(--go-navy);
    margin-bottom: 10px;
    font-weight: 800;
}

.category-info p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 25px;
    line-height: 1.5;
}

.category-btn {
    width: 100%;
    background-color: var(--go-navy);
    color: white;
}

.category-btn:not(:disabled):hover {
    background-color: var(--go-navy-light);
}

.category-btn:disabled {
    background-color: #e0e5ec;
    color: #a0aab5;
    cursor: not-allowed;
}