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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --secondary: #6b7280;
    --light: #f3f4f6;
    --border: #e5e7eb;
    --text: #1f2937;
    --text-light: #6b7280;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f9fafb;
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* NAVBAR */
.navbar {
    background: white;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.navbar h1 {
    font-size: 1.5rem;
    color: var(--primary);
}

.nav-actions {
    display: flex;
    gap: 10px;
}

/* BOTONES */
.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-small {
    padding: 8px 12px;
    font-size: 13px;
}

.btn-cerrar {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-cerrar:hover {
    color: var(--text);
}

/* VISTAS */
.vista {
    display: none;
    padding: 30px 0;
}

.vista.activa {
    display: block;
}

/* LISTA DE PROYECTOS */
.filtros {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.input-busqueda {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
}

.input-select {
    padding: 10px 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: white;
    cursor: pointer;
}

.lista-proyectos {
    display: grid;
    gap: 15px;
}

.proyecto-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
}

.proyecto-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.proyecto-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.proyecto-titulo {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
}

.proyecto-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-nuevo {
    background: #dcfce7;
    color: #166534;
}

.badge-continuidad {
    background: #fef3c7;
    color: #92400e;
}

.proyecto-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.proyecto-acciones {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.proyecto-acciones button {
    padding: 6px 10px;
    font-size: 12px;
}

.mensaje-vacio {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.mensaje-vacio p {
    font-size: 1.1rem;
}

/* FORMULARIO */
.form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 20px;
}

.form-header h2 {
    font-size: 1.8rem;
    color: var(--primary);
}

.tabs {
    display: flex;
    gap: 2px;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 20px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-light);
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text);
}

.tab-btn.activo {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
    animation: fadeIn 0.2s;
}

.tab-content.activo {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="date"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    font-weight: normal;
    margin-bottom: 0;
}

.checkbox-group input {
    margin-right: 8px;
    cursor: pointer;
}

/* PERSONAL */
.personal-section {
    background: var(--light);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 25px;
}

.personal-section h3 {
    margin-bottom: 20px;
    color: var(--primary);
}

.investigador-item {
    background: white;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 10px;
    border-left: 4px solid var(--primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.investigador-info p {
    margin: 4px 0;
    font-size: 14px;
}

.investigador-info strong {
    color: var(--primary);
}

.investigador-rol {
    font-size: 12px;
    background: var(--light);
    padding: 4px 8px;
    border-radius: 4px;
    color: var(--text-light);
}

/* PRESUPUESTO */
.presupuesto-section {
    margin-bottom: 40px;
}

.presupuesto-section h3 {
    margin-bottom: 15px;
    color: var(--primary);
    font-size: 1.1rem;
}

.tabla-presupuesto {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 15px;
}

.tabla-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr 1.2fr 1fr 1fr 80px;
    gap: 0;
    background: var(--light);
    padding: 12px;
    font-weight: 600;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}

.tabla-fila {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr 1.2fr 1fr 1fr 80px;
    gap: 0;
    padding: 12px;
    border-bottom: 1px solid var(--border);
    align-items: center;
}

.tabla-fila:last-child {
    border-bottom: none;
}

.tabla-fila input {
    padding: 6px 8px;
    font-size: 13px;
}

.tabla-fila .btn-danger {
    padding: 4px 8px;
    font-size: 12px;
}

.resumen-presupuesto {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin-top: 30px;
}

.tabla-resumen {
    width: 100%;
    max-width: 400px;
    margin-left: auto;
}

.tabla-resumen tr {
    border-bottom: 1px solid var(--border);
}

.tabla-resumen td {
    padding: 12px;
    text-align: right;
}

.tabla-resumen td:first-child {
    text-align: left;
    font-weight: 500;
}

.tabla-resumen .total-fila {
    background: var(--light);
    font-weight: 600;
    font-size: 1.1rem;
    border-top: 2px solid var(--primary);
}

/* CRONOGRAMA */
.tabla-cronograma {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow-x: auto;
}

.actividad-item {
    padding: 15px;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 80px;
    gap: 15px;
    align-items: center;
}

.actividad-item:last-child {
    border-bottom: none;
}

.actividad-item input {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
}

/* MODAL */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.activo {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 30px;
    max-width: 500px;
    width: 95%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 15px;
}

.modal-header h2 {
    color: var(--primary);
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 25px;
}

/* ACCIONES DEL FORMULARIO */
.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .nav-actions {
        width: 100%;
    }

    .nav-actions .btn {
        flex: 1;
    }

    .filtros {
        flex-direction: column;
    }

    .tabs {
        overflow-x: auto;
    }

    .tab-btn {
        padding: 10px 15px;
        white-space: nowrap;
    }

    .tabla-header,
    .tabla-fila {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .actividad-item {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .proyecto-acciones {
        width: 100%;
    }

    .proyecto-acciones button {
        flex: 1;
    }
}